- Code simplification ignored case where exception was raised.
- If LockError was raised, read and write counts were incremented erroneously.
- updated lock test.
- llnl.util.lock now uses fcntl.lockf instead of flock
- purported to have more NFS compatibility.
- Added an extensive test case for locks.
- tests acquiring, releasing, upgrading, timeouts, shared, & exclusive cases.
1. Database stores a file version, so we can add to it in the future.
2. Database indexed by hashes and not numerical indexes.
3. Specs built by database have consistent hashes and it's checked.
4. minor naming and whitespace changes.
Most importantly wrote the Lock, Read_Lock_Instance, and Write_Lock_Instance classes in lock.py
Updated the locking in database.py
TODO: Lock on larger areas
