Add test that double checks we do not have any URL encode/decode mistmatches and that keys/values make it to the DB as intended.

Summary:
Add skipped tests for meta key manipulation from http rest API. Move files around to get package dependencies to work correctly

Implement Skipped test for counter/entry interactions in the REST API. Requires lower-level storage support that is TBD

Rename increasingly misnamed helper function

Test Plan: go test

Reviewers: andybons, spencerkimball

Reviewed By: spencerkimball

Subscribers: team

Differential Revision: http://phabricator.cockroachdb.org/D116