Merge pull request fbergama#45 from fbergama/develop

Develop

Merge pull request fbergama#43 from fbergama/develop

Develop

Merge pull request fbergama#40 from fbergama/develop

Develop

Typo readme

Load bitmaps with ASCII chars, hex oder decimal encoding

Fix for drawing circles with parts outside of screen

Improved graphics performance

Small improvements, don't draw outside of screen

Merge pull request fbergama#31 from fbergama/bitmap

First version of spritehandling

Bugfix key repeat