examples: html lib example

Signed-off-by: Alexandre Terrasa <alexandre@moz-code.org>

diff --git a/examples/html_page.nit b/examples/html_page.nit
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+++ b/examples/html_page.nit
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+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import html
+
+class NitHomepage
+       super HTMLPage
+
+       redef fun head do
+               add("meta").attr("charset", "utf-8")
+               add("title").text("Nit")
+               add("link").attr("rel", "icon").attr("href", "http://nitlanguage.org/favicon.ico").attr("type", "image/x-icon")
+               add("link").attr("rel", "stylesheet").attr("href", "http://nitlanguage.org/style.css").attr("type", "text/css")
+               add("link").attr("rel", "stylesheet").attr("href", "http://nitlanguage.org/local.css").attr("type", "text/css")
+       end
+
+       redef fun body do
+               open("article").add_class("page")
+                       open("section").add_class("pageheader")
+                               add_html("<a id='toptitle_first' class='toptitle'>the</a><a id='toptitle_second' class='toptitle' href=''>Nit</a><a id='toptitle_third' class='toptitle' href=''>Programming Language</a>")
+                               open("header").add_class("header")
+                                       open("div").add_class("topsubtitle")
+                                               add("p").text("A Fun Language for Serious Programming")
+                                       close("div")
+                               close("header")
+                       close("section")
+
+                       open("div").attr("id", "pagebody")
+                               open("section").attr("id", "content")
+                                       add("h1").text("# What is Nit?")
+                                       add("p").text("Nit is an object-oriented programming language. The goal of Nit is to propose a robust statically typed programming language where structure is not a pain.")
+                                       add("p").text("So, what does the famous hello world program look like, in Nit?")
+                                       add_html("<pre><tt><span class='normal'>print </span><span class='string'>'Hello, World!'</span></tt></pre>")
+
+                                       add("h1").text("# Feature Highlights")
+                                       add("h2").text("Usability")
+                                       add("p").text("Nit's goal is to be usable by real programmers for real projects")
+
+                                       open("ul")
+                                               open("li")
+                                               add("a").attr("href", "http://en.wikipedia.org/wiki/KISS_principle").text("KISS principle")
+                                               close("li")
+                                               add("li").text("Script-like language without verbosity nor cryptic statements")
+                                               add("li").text("Painless static types: static typing should help programmers")
+                                               add("li").text("Efficient development, efficient execution, efficient evolution.")
+                                       close("ul")
+
+                                       add("h2").text("Robustness")
+                                       add("p").text("Nit will help you to write bug-free programs")
+
+                                       open("ul")
+                                               add("li").text("Strong static typing")
+                                               add("li").text("No more NullPointerException")
+                                       close("ul")
+
+                                       add("h2").text("Object-Oriented")
+                                       add("p").text("Nit's guideline is to follow the most powerful OO principles")
+
+                                       open("ul")
+                                               open("li")
+                                               add("a").attr("href", "./everything_is_an_object/").text("Everything is an object")
+                                               close("li")
+                                               open("li")
+                                               add("a").attr("href", "./multiple_inheritance/").text("Multiple inheritance")
+                                               close("li")
+                                               open("li")
+                                               add("a").attr("href", "./refinement/").text("Open classes")
+                                               close("li")
+                                               open("li")
+                                               add("a").attr("href", "./virtual_types/").text("Virtual types")
+                                               close("li")
+                                       close("ul")
+
+
+                                       add("h1").text("# Getting Started")
+                                       add("p").text("Get Nit from its Git repository:")
+
+                                       add_html("<pre><code>$ git clone http://nitlanguage.org/nit.git</code></pre>")
+                                       add("p").text("Build the compiler (may be long):")
+                                       add_html("<pre><code>$ cd nit\n")
+                                       add_html("$ make</code></pre>")
+                                       add("p").text("Compile a program:")
+                                       add_html("<pre><code>$ bin/nitc examples/hello_world.nit</code></pre>")
+                                       add("p").text("Execute the program:")
+                                       add_html("<pre><code>$ ./hello_world</code></pre>")
+                               close("section")
+                       close("div")
+               close("article")
+       end
+end
+
+var page = new NitHomepage
+page.save("nit.html")