made 0.7.5 release

Merge pull request teeworlds#2343 from Dune-jr/fix-statboard

Couple more bugfixes

fixed cmake version check

fixed recursive path creating on windows

Merge branch 'master' of https://github.com/teeworlds/teeworlds

Merge pull request teeworlds#1846 from Dune-jr/fix-linux_x86

Add -msse2 flag to bam.lua for linux x86 compilation

Fix "unpause the game when all players left"

Previously, it would pause the game when the last player left.

Fix warnings