elasticsearch version bumped to 0.21.0.Beta1-SNAPSHOT
updated dependencies' versions
prepared CouchdbConnectionConfig
prepared CouchdbDatabaseConfig
added more test cases to config classes
prepared IndexConfig
minor test improvements
configuration refactoring (actually slightly changed)
aligned readme with updated config schema
threads bundled into a list
index initialization retried in case of cluster exception
extracted slurper to a separate class, added roverConfig (to be simplified hopefully)
initial refactoring of slurper
moved Helpers to util pkg
extracted LastSeqReader
LastSeqReader refactored + unit-tested
extracted UrlBuilder
changes feed connection stuff simplified
logging simplified in slurper
extracted listenForChanges() in slurper