Remove unused ANT build file

Legacy, from CI integration work.
Rework handling of login attempts

Fixes #25
Character creation changes

* Race implemented
* Race DataAccessObjects
* New methods to handle character creation
* More error conditions in network protocol
Client changes for character selection & creation

* Switched from list of network data to PlayerCharacters
* Added handling for error messages
* Added handling for character created messages
* Fixed documentation comment
* Added parameters to PlayerCharacter