Using haml now.
compile.bat concatenates and compiles the coffeescript.
New Maze draws a rectangle.

Possible configuration values:
offset: horizontal/vertical
border: top/bottom, left/right
Grid is now nice and can be scrolled xD
Simple Tile Drawing works now. Coordinates only get calculated once.
The grid can be moved within the drawn border.
moving the rectangle which contains the grid works correctly
Moving the cells withing the displayed rectangle now works correctly. Only the neede drectangles are drawn on the screen.
horizontal movement of the grid within the rectangle works now correctly. (final version i hope)
Finally: Border+Offset works well together.

Inside can be dragged around independently from the outside.
The grid correctly stops being drawn at the end of it :D
Moving the grid around works very nicely now.
Fixed first row not visible on load with starting offset of 1
Clicking swaps "walls"
Again some bugfixes for the moving. I think this time the grid is correctly drawn in all configurations.