cleaning up sqlite_blocking.py example, adding documentation
list comprehension for train data_d
refactored the Dedupe class so it takes a sample of record pairs instead of dictionary of records
moved dataSamples into dedupe.py and out of core
cleaned up and documented sqlite_blocking and sqlite_clustering
dedupe.blockData instead of dedupe.blocking.blockIndex. All calls in examples now in main namespace, cleanup of quotes
Merge pull request #79 from open-city/sqlite_docs

cleaning up sqlite_blocking.py example, adding documentation