Merge pull request #459 from boegel/v1.8.0.x

fix faulty easyconfig file names
correct version to v1.8.1.0
Merge branch 'v1.8.0.x' of github.com:hpcugent/easybuild-easyconfigs into v1.8.0.x
bump version to v1.8.1.0, update release notes
fix easyconfig file names w.r.t version suffixes
Merge pull request #462 from boegel/v1.8.0.x

fix easyconfig file names w.r.t version suffixes
add PR #462 to release notes, fix typo
Merge pull request #461 from boegel/v1.8.1.0

bump version to v1.8.1.0, update release notes
bump version to 1.9.0.0dev