[PAT-528] Cassette minifier strips css3 symbol - broken integration test demonstrating tangential related issue with CombinedStyleSheet bundles
[PAT-528] Cassette minifier strips css3 symbol - code fix for CombinedStyleSheet bundles bug (test introduced last commit)
[PAT-528] Cassette minifier strips css3 symbol - code fix for CombinedStyleSheet bundles bug (test introduced last commit)
[PAT-528] Cassette minifier strips css3 symbol - add missing test file to Cassette.IntegrationTests project