Updated readme to reflect new version
Ensuring IAssemblyContexts are run only once first cut fix, still need to ensure the version of mspec being run supports this
Merge branch 'master' of https://github.com/eugeneduvenage/machine.vstestadapter into dev
updated version in readme
Merge remote-tracking branch 'upstream/dev' into dev

Conflicts:
	Source/Machine.Specifications.VSRunner/AppDomainExecutor.cs