Add pr #151 / issue #149 to release notes, add nuspec for new lib
Update version to 0.7.0.0
Add .nupkg files to .gitignore
Add TimeSpan datum converter factory & datum converter
Expressions adding TimeSpan to DateTime
Change Add... expressions to use server-side conversion
Integration tests for Add... methods
Release notes update
* Updating README.md with Newtonsoft and link fixes.
removing extra space
* README.md update.