Added README and Makefile

Signed-off-by: Djomanix <johan.kayser@viacesi.fr>

diff --git a/contrib/online_ide/Makefile b/contrib/online_ide/Makefile
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+++ b/contrib/online_ide/Makefile
@@ -0,0 +1,12 @@
+default:
+       ../../bin/nitg --global sources/nit/pnacl_nit.nit -I ../../src/
+       cp pnacl_nit/pnacl_nit.pexe www/pnacl/ -f
+       rm -rf pnacl_nit/
+       rm -rf .nit_compile
+
+HTTPD_PY := python $(NACL_SDK_ROOT)/tools/httpd.py
+serve:
+       cd www/; \
+        $(HTTPD_PY) -C . --no-dir-check
+
+.PHONY: serve

diff --git a/contrib/online_ide/README b/contrib/online_ide/README
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+++ b/contrib/online_ide/README
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+This file contains all the informations about the Nit online IDE.
+
+I. SETUP
+
+0.a. Install the native client SDK if needed(https://developer.chrome.com/native-client/sdk/download).
+
+0.b. Declare the environment variable NACL_SDK_ROOT as the root of the target platform within the SDK (ex: ~/nacl_sdk/pepper_34/) :
+       $ export NACL_SDK_ROOT=/path/to/nacl_sdk/pepper_[your_version]
+
+1. Run the Makefile with 'make' (this will compile the pnacl module for the interpreter and place it in the right folder).
+
+2. Search for the Ace sources, go to 'https://github.com/ajaxorg/ace-builds/' and get the 'src' folder,
+put it in 'www/'.
+
+NOTE: The application has been developped with a package from 03.02.2014,
+in case of any problem, you can find it here :
+'https://github.com/Djomanix/ace-build-for-nit'.
+-> If you get this one, you can skip 3. and 4.
+
+3. Copy 'mode-nit.js' from folder 'setup' to folder 'www/src'.
+
+4. Copy 'nit.js' from folder 'setup' to folder 'www/src/snippets'.
+
+
+II. GETTING STARTED
+
+1. Run 'make serve', this will host the application on 'http://localhost:5103/'.
+
+NOTE:
+1. The application only works in Google Chrome or Chromium.
+2. It is recommended to open the Chrome console while using the application
+(to see what's going on).
+3. The application is ready when the terminal appears in the page
+and when the message :
+'Nit library loaded (... files), ready to go.' is displayed in the Chrome console.
+4. Loading may take some time when the browser loads a pnacl module for the first time.
+
+
+III. FEATURES
+       - CTRL+E: this shortcut launches the interpretation of the code written in the editor.
+       - CTRL+S: this shortcut enables you to download the file you have been writting.
+       - By clicking on the file name you can change it.
+       - The editor has some auto-completion and research features.
+
+
+IV. HOW TO EDIT
+
+1. The folder 'sources/nit' contains the file 'pnacl_nit.nit' which is the source
+of the pnacl module. You can edit the module directly here, and run 'make' to compile it (it will be placed automatically where needed).
+
+2. The folder 'sources/nit_mode_for_ace' contains the source files necessary to
+generate the Ace mode for Nit.
+You can also edit them if you need to improve the Nit support, see :
+- 'http://ace.c9.io/#nav=higlighter'
+
+
+V. HOSTING
+
+1. To host the application, just copy the 'www' folder where you want.
+
+NOTE: The application has been successfully tested on a python server and an apache server.