Merge: SharedPreferences: Nit API wrapping android SharedPreferences class

A module wrapping 'android.content.SharedPreferences' allowing to load/save data to internal storage for the android platform. Some tests have been added to the mnit_simple example.

The compiler has been slightly modified to ignore '
' in java extern types.

As asked by @privat and @xymus to store persistant game data.
Signed-off-by: Frédéric Vachon <fredvac@gmail.com>

Pull-Request: #495
Reviewed-by: Jean Privat <jean@pryen.org>
Reviewed-by: Alexis Laferrière <alexis.laf@xymus.net>
Reviewed-by: Alexandre Terrasa <alexandre@moz-code.org>
Reviewed-by: Romain Chanoir <chanoir.romain@courrier.uqam.ca>

diff --combined src/common_ffi/java.nit
index 68ba1e9,e220db4..f6e44f7
--- 1/src/common_ffi/java.nit
--- 2/src/common_ffi/java.nit
+++ b/src/common_ffi/java.nit
@@@ -290,10 -290,8 +290,10 @@@ redef class AExternPropde
                var sys_class = modelbuilder.try_get_mclass_by_name(self, mmodule, "Sys")
                assert sys_class != null
                var sys_jni_env_meth = modelbuilder.try_get_mproperty_by_name2(self, mmodule, sys_class.mclass_type, "jni_env")
 -              assert sys_jni_env_meth != null
 -              assert sys_jni_env_meth isa MMethod
 +              if sys_jni_env_meth == null or not sys_jni_env_meth isa MMethod then
 +                      toolcontext.error(self.location, "Java FFI error: you must import the `java` module when using the FFI with Java")
 +                      return
 +              end
  
                explicit_call = new MExplicitCall(sys_class.mclass_type, sys_jni_env_meth, mmodule)
                fcc.callbacks.add(explicit_call)
@@@ -351,7 -349,7 +351,7 @@@ class JavaFil
        super ExternFile
  
        redef fun makefile_rule_name do return "{filename.basename(".java")}.class"
 -      redef fun makefile_rule_content do return "javac {filename} -d ."
 +      redef fun makefile_rule_content do return "javac {filename.basename("")} -d ."
        redef fun add_to_jar do return true
  end
  
@@@ -465,7 -463,7 +465,7 @@@ redef class MClassTyp
        do
                var ftype = mclass.ftype
                if ftype isa ForeignJavaType then return ftype.java_type.
-                       replace('/', ".").replace('$', ".").replace(' ', "")
+                       replace('/', ".").replace('$', ".").replace(' ', "").replace('\n',"")
                if mclass.name == "Bool" then return "boolean"
                if mclass.name == "Char" then return "char"
                if mclass.name == "Int" then return "int"
@@@ -487,7 -485,7 +487,7 @@@
        redef fun jni_format
        do
                var ftype = mclass.ftype
-               if ftype isa ForeignJavaType then return "L{ftype.java_type.replace('.', "/").replace(' ', "")};"
+               if ftype isa ForeignJavaType then return "L{ftype.java_type.replace('.', "/").replace(' ', "").replace('\n', "")};"
                if mclass.name == "Bool" then return "Z"
                if mclass.name == "Char" then return "C"
                if mclass.name == "Int" then return "I"