v1.2.0

• LIB: Now uses ASyncTask insted of Thread. (Fixed #7)
• LIB: Implemented "No, thanks" button in dialog. (If the user tap on this button, the library will not show again the dialog/notification for this update.)
• LIB: 2 new interfaces to facilitate the reading of UpdateChecker.java.
• DEMO: App redesigned and rewritten (now uses custom style).
  • DEMO: New Infos activity.
  • DEMO: New buttons for tests.
  • DEMO: New icon.
  • DEMO: New style for Dialog.
• DEMO: Removed ActionBarSherlock dependency.
• DEMO: minSdkVersion set to 11.