Update README.md

Usage examples assume that Machine.Specifications.Should is available.
Removed usage of DelegateUsageAttributes
Removed IgnoreAttribute constructor
Update gems
Resharper 8.2 EAP support
Update README.md

Added missing ";"
Resharper 8.2 Support, dotCover 2.7 support, removed Resharper 6.0 to 7.0 support, removed dotCover 2.0 to 2.2 support
Merge remote-tracking branch 'lenny/patch-2' into release-0.8
Merge branch 'release-0.8'