Ignore deletions predating the existing cache item.
Change to order when comparing delete time with cache time
Merge pull request #85 from pantheon-systems/ignore-older-deletions

Ignore Older Deletions [TESTING]
Ignore compile file.
Do not bump stat data on flush or release if no data was written.
Use telltale indicator of failing to seek.
Merge pull request #87 from pantheon-systems/master

Deploy mtime fix and deletion-replacement race condition fix