issue #1620: Added sqlite3 library for win32.
issue #1620: Added LocalStorage support to extensions.
issue #1620: Renamed LocalStorage.c to LocalStorage.cpp
issue #1620: Binding sqlite3 to sys.localStorage. And updated win32 project configuration.
fixed #1620: Using sqlite3 to implement sys.LocalStorage for iOS and android.
fixed #1620: Invoking localStorageFree in the destructor of ScriptingCore. Added header file to cocos-ext.h
fixed #1620: Check return value.
fixed #1620: Added license. Removed LocalStorage.h from cocos-ext.h.
Merge pull request #1823 from dumganhar/iss1620-sys-localstorage

fixed #1620: Using sqlite3 to implement sys.LocalStorage.