Merge pull request #5 from mredar/master

Change queue_harvest to work with string list of collection urls
Merge branch 'master' of https://github.com/ucldc/harvester
Merge branch 'master' of https://github.com/mredar/harvester
Merge pull request #6 from mredar/master

Solr Index fetcher and bug fixes
Merge branch 'master' of https://github.com/ucldc/harvester