Initial import.  Hold reference and reference store objects.
Updated MapDB and added support for custom value serializer.
Typo.
Added license information and assembly descriptor.
Added collector/crawler loading.  Added refstore.  Introduced "pipeline"
concept.
Added more properties to reference.  Removed refstores except mapdb.
Fixed reference cloning issues.
Removed useless cast.
Everywhere, Reference is now DocCrawl.
Moved Pipeline-related classes to Norconex Commons Lang.
Added crawler event related classes.
Changed crawler event log level to debug.
Removed dead comments.
Code cleanup.
Added collector elapsed time.
Added back Derby implementation for storing reference data.
Renamed and updated all reference to DocCrawl to CrawlData.
Added MongoDB crawl data store.
Added H2 database support for Crawl data store.
Added a lot of code/classes/features from HTTP Collector and Filesystem
collector that were common to both.