Allow cassandra boostrapper to be enabled/disabled in configuration
Surround single document indexing with a try/catch so the indexing operation doesn't fail if there's a problem with a single item.
Switch to using slf4j for logging.
Merge pull request #14 from atlasapi/mbst-4074-null-pointer-exception

Better exception handling when indexing
Remove call to deprecated slaveOk method
Allow multiple mongo hosts to be specified
* Multithread indexing
* Remove condition that last broadcast must be at most 365 days ago
Merge branch 'mbst-4187-multithread-update' into stage

Conflicts:
	src/main/java/org/atlasapi/search/AtlasSearchModule.java
	src/main/java/org/atlasapi/search/searcher/LuceneContentIndex.java