Changed all nuget hint paths to be relative to solution, this makes it easier to use cassette in integration projects (like Cassette.Nancy).
all exceptions now follow the framework guidelines

addresses #359. these exceptions must be able to cross an appdomain boundary to aid in debugging
Merge branch 'issue/359' of git://github.com/thefringeninja/cassette into thefringeninja-issue/359
v2.2.2