Removing time range caching to simplify implementation.
Merge branch 'master' into NAWQAAN-180
Revert "Removing time range caching to simplify implementation."

This reverts commit 1a50d79f4f9877c183a3f9f5213a193d1953f690.

Reverting because inconsistency between metadata and data was causing bad behavior, not the caching code.
Merge pull request #77 from cschroed-usgs/NAWQAAN-180

Nawqaan 180