#8 #10 #11 Implemented manipulation with user information.
- Updated imports to new scope annotations (old didn't work)
- Implemented addition of new user.
- Implemented edition of user information.
- Enhanced deletion of user with exception handling.
- Fixed work with UTF8 encoding (czech words work now).

Some changes need to have fixed some bugs of Mojarra 2.2.0
implementation. Recommended version to use with Glassfish 4 is Mojarra
2.2.6.