Renaming test file to more accurate name
Made Specification internal so that internal classes in Seleno can be unit tested
Added xmldoc comments to ISelenoApplication
Added a not null check to SelenoHost to ensure that you can't run it multiple times and have applications that can't be shutdown
Moved the domain unload event to the SelenoHost and instead made SelenoApplication IDisposable
Also added unit tests for SelenoApplication
Merge pull request #67 from robdmoore/make-seleno-application-disposable

Yeah, like what you did making SelenoApplication disposable and a good step towards multiple browsers/sites!