Extracted ReadSet, created TransientSet, Initial Transient Set implementation
Merge remote-tracking branch 'origin/master' into transientSet
Updated set interface and transient tests added
Merge remote-tracking branch 'origin/master' into transientSet
Updated original test with delete(safe), standardized filenames, ready to pull
Simplified Set tests
Merge pull request #16 from vacuumlabs/transientSet

Transient set