Added first tile joints
First test (a bit hardcoded)
Side patches (still hardcoded)
Prettier mountain
Better behavior of trees before water
Merge branch 'master' into joint
Merge branch 'master' into joint
Less ugly stuff

Deleted draw_texture_i and added optional parameter to draw_texture
to be able to draw with a screen offset.
Merge pull request #67 from GL-MPRI-2014/joint

Joint