Replace MSTest with xUnit
upgraded Helios and bumped version to v0.6.1
Replaced missing failure assertion.

This was missing.
Fix casing in string.Format

(using github online editor)
Merge pull request #183 from danbarua/refactor-to-xunit

Replace MSTest with xUnit
Merge pull request #184 from Aaronontheweb/dev

upgraded Helios and bumped version to v0.6.1
Restructure the repository
Update gitignore

Using https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
Fix build to run xUnit tests