Version 0.76 beta released.

Version 0.76 of nmaFPS has been released. The releases are still beta because there still are some major bugs to be fixed.

Major changes in this released:
* The biggest addition is the level system. There are 3 levels as of now.
* Sounds have been added for different events.
* Text messages are now displayed. This was made possible by libgltext (gltext.sf.net).