Move the HBase parts out of TsdbQuery into HBaseStore
Change the TsdbStore interface to execute queries to return a specialized iterator
Add a simple uid resolv helper
Extract a query builder out of TsdbQuery
Convert all query users to use the query builder
Allow end_time to be unset
Use optionals instead of an UNSET constant
Revert to importing manually instead of *
Document #createQuery better
Fix #appends to not use concatenation in QueryRunner
Merge pull request #41 from hi3g/next_query_builder

Extract the creation of TsdbQuery objects into a QueryBuilder
Don't expose the scanner from the TsdbQuery through Internal
Finish migration of relevant things to QueryRunner so it compiles
Merge pull request #42 from hi3g/next_query_queryrunner

Finish migration of relevant things to QueryRunner so it compiles
Move the query execution into QueryRunner
Cleanup filter methods and add some comments to ScannerCB
Prefer to use guava methods instead of reimplementing in opentsdb
Merge pull request #43 from hi3g/next_query_cleanup

Prefer to use guava methods instead of reimplementing in opentsdb
Replace manual casting with guavas checkedCast
Iterate directly over CompactedRows (prev RowSeqs) instead of going top down