fixed docstring
Merge pull request #465 from JensTimmerman/develop

fixed docstring
add sbin to default subdirs checked for PATH
Merge pull request #471 from boegel/develop

add sbin to default subdirs checked for PATH
Merge pull request #459 from stdweird/generaloption

Generaloption support
Merge branch 'develop' of github.com:hpcugent/easybuild-framework into generaloption