Updated project file

Added code analysis and set to treat warnings as errors.
Merge branch 'master' of https://github.com/jwood803/CSharpVerbalExpressions
Updated tests

Saw some tests seemed to still have the TestMethod attribute. Updated
those and some tests were failing so added Setup and Teardown methods.
Tests are now all green.
Update README.md

Updated how to get started since NUnit is now a required library and does not come included with GitHub.
Updating back to what the main repository should have