removed weird if from the pure server/tune check

This fixes teeworlds#1110 on GitHub.

fixed map downloading auth check

Removed useless enum

Cleaned up bam.lua, added buildbot support

added skins by MobyDog

added the client executable to .gitignore

fixed last commit

temporary fixed linux crash on disconnect

executed scripts/cleanup.py

added sorting for the console command that lists the maps on the server