Additional language pack and levels

This is a major patch of MadCowBalls2 that makes the game easier for beginners and adds a choice of levels at the start of the game session. As i have been working on it for a while i may have forgotten all the bugs that was identified and solved a long the way. [h1]New features[/h1] [list] [*]Diamond levels. [*]Ball speed reduction near the city. [*]Additional language support. [*]The thank you screeen is also displayed when the user restart the game from the high score screen. [/list] [h3]Bug fixes[/h3] [list] [*]Undertext is now displayed when language "English" is selected or identified (none, us and uk). [*]Random level generator could in rare cases get stuck. [*]Unkown solved minor bugs (i dont remember them anymore). [/list]