bump version to 1.3.0rc1
also check skipsteps in build_easyconfigs used by regtest
bump version to 1.3.0rc2
fix language remark
Merge pull request #583 from boegel/v1.3.0rc1_bug_fixes

v1.3.0rc1 bug fix: skipsteps in regtester
Merge branch 'v1.3.x' of github.com:hpcugent/easybuild-framework into v1.3.x
Merge branch 'v1.3.x' into develop