Merge pull request #14 from talkToHoney/master

pull request
Merge pull request #15 from talkToHoney/master

pull request
webview url button fix

little bug fix
Facebook, Twitter Log-out

1. Facebook Logout, if user do not click logout button, backPresskey
will go home.
2. Twitter Logout add.

-> If Twitter or Facebook logged in, the other service's Button will not
appear in LoginActivity.
-> When logged in, messages are changed.
Merge