Updated the Heartbeat plugin and the CustomCheck plugin to use NSB v3.3.0 instead of v3.3.9. Also set the min dependency on the Nuget packages to be 3.3.0 instead of 3.3.9
Refer #304 - Fix for SendOnly Endpoints
Cleanup
Updated to latest NugetPackager and GitVersionTask.
Merge branch 'release-1.0.0'