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