Added freenode.txt for Freenode IRC channel verification (to reclaim #airtime)
Merge branch '2.5.x'
Enforce a minimum PHP version of 5.4.0 on install and upgrade.
Merge branch '2.5.x'
Merge branch '2.5.x'
Merge branch 'master' of github.com:sourcefabric/Airtime
Merge branch '2.5.x'
Delete freenode.txt
Merge branch 'master' of github.com:sourcefabric/Airtime into 2.5.x
Merge branch '2.5.x' of github.com:sourcefabric/Airtime into 2.5.x

Conflicts:
	install_minimal/include/airtime-install.php