Normalize strings used in metrics
Normalize strings used in metrics

Librato does not like spaces and such, and this will look better too
(with everything lowercased).

kidaa/travis-core,developerfm/travis-core,GistIcon/travis-core,final-ci/travis-core,final-ci/travis-core,Tiger66639/travis-core,developerfm/travis-core,final-ci/travis-core,Tiger66639/travis-core,travis-ci/travis-core,jantman/travis-core,Tiger66639/travis-core,travis-ci/travis-core,kidaa/travis-core,GistIcon/travis-core,GistIcon/travis-core,travis-ci/travis-core,kidaa/travis-core,jantman/travis-core,developerfm/travis-core