Bumped version number to 1.5.1.0
Merge pull request #20 from serverdensity/release-1.5.1

Bumped version number to 1.5.1.0
Check for mongo 2.2, and don't attempt to get the global lock ratio if so
Use a 10 second thread timeout to control network drive hang
Merge pull request #23 from serverdensity/issue-22-network-drive-hang

Issue 22 network drive hang