prepare for next development iteration
ETPLT-3 Error message for bad credentials, externalize credentials
ETPLT-3 Error message for bad credentials, externalize credentials
Merge pull request #1 from jameswennmacher/ETPLT-3

ETPLT-3 Error message for bad credentials, externalize credentials
Merge branch 'master' of github.com:Jasig/EsupTwitter