CI/Travis: Compile all branches

Also added master and 4.3.4 build status to the README
CI/Travis: Fix typo added in previous commit
Conf/World: Disable player limit by default
Core/Network: Optimized packet sending by removing unneccessary memory copying
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore

Conflicts fixed:
	.travis.yml