Updated graphic assets, .pro file for proper qmake/make compilation and README with new coin spec

- Updated the .pro file with the latest litecoin master code, successfully builds (modified the file to support only down to OSX 10.7)
- Updated all graphic assets to KittehCoin
- Updated README with revised coin spec (small todo still left)
- Brought over the latest /share assets from the litecoin master
- Modified .plist file for proper wallet compilation (untested)