add ported easyblock for GATE, which supports building and installing GATE v6.1, v6.2, v7.0
fix remarks
Merge branch 'develop' into GATE
also add include/root to $CPATH in ROOT easyblock
fix custom $CPATH setting in ROOT easyblock
fix version check in GATE easyblock
Merge pull request #518 from boegel/GATE

add ported easyblock for GATE