More ifdefs \o/ (fix build even more)

Lazy fix for server build

Added tag 0.9.21-release, fab746a3597e for changeset 7e55468ffe38

Update .hgignore file

merge, mah friend, long time no see

- some new mission icons - add variable portal limiter (and effects) to TechRacer - allow variable (not just infinite) ufo fuel - possibly break stuff some - more whitespace?

cursor x/y when targeting for mikade's visual effects. this is not synced

Fix building hedgewars-server

Allow skipping the bundle step after install on OSX

Make sure that the png library name is always defined