Add project biography.
Reject subscription if email already exists.

Close #4.
Add 'return true' just in case.
Tidy up user profile.

Move inline style from PHP file to CSS file.

Removed unnecessary variables in UserController and user view.
Add comment about User.getThumbnail security.
CHtml::encode user phone and email.
Add methods User::is and User.isCurrentUser.

Improve code readability.
Remove doubt about CController.createAbsoluteUrl.
Fix user deletion.