Sleep should be reset to the same action it was initialized with
Reference the Net45 library for unit tests
Update version and information to include PCL addition
Update nuget.exe to v2.8
Enable xml documentation for PCL library
Modify build to include PCL library in NuGet package
Update NuGet description to include PCL addition
Make Polly unsigned by default and migrate signed to Polly-Signed. Closes #5.