Updated README to point to new CI-Server address.
Added 3 new bricktypes.

21 = REMBRICK, Removed any brick on top of it.
This could be used to make a scenario where removing a brick is the only
way to solve a puzzle, or to place a trap which may make the puzzle unsolvable.

22 = COPYBRICK, If there is a brick on top of this, it will make a copy of that
     brick on the field below if that field is free. Will create one every 500 ms.

23 = EVILBRICK, if a brick touches this, player loses a life.

These bricks works with switches too.
Still needs graphics.
Changed Makefile.linux to allow DEBUG=true on make.

This removes -O3 flag, disables strip and adds debugging symbols.
Draw new bricks as walls.

This allows the new tiles to be integrated into the wall graphics.