Adding Analyzers

[tlmii]

This PR is all about enabling analyzers on HttpRepl and addressing the errors that came from it. I took the .ruleset files from https://github.com/aspnet/LibraryManager. This PR touched a good number of files, so I broke up the changes into four parts:

1. Commit 022d9da split the folder structure off so that test projects were in their own project separate from the main source.
2. Commit f520782 enabled analyzers for the src/ projects
3. Commit fe6b193 addressed all of the errors that were not related to strings/resources
4. Commit 09d3d78 addressed the string/resources errors

For that last commit, the analzers wanted me to put things like HTTP, ;, ,, :, and / into resources. I realized it was because the SetColor exension method's first parameter was named text. Renaming that to textToColor made the errors go away. I addressed all the ones that were actual localizable text first before doing that..

[jodavis]