Fix concatenated asset when using spriting
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
Updated to cassette 2.2.2