NEW FEATURE: 06/20/2014 - 2

1. Added auto updater. Will search for update when the program starts
(can be turned off in settings). Users can also check for updates
manually.
2. Re-organized source codes.
3. Changed some public classes to internal classes. Higher level of
security.
Merge remote-tracking branch 'origin/master'

Conflicts:
	SimpleEpub2_Update.xml