Updating NuGet framework assemblies for Release 1.2.0.

Added Inverse Expression method

Also, should start doing SemVer, not matter how small the feature.

Removed namespace wrapper around EnumExtensions.

Added some more extension methods.

Rolling back key trimming for backwards compat on old apps. Passphras…

…e supplied in appSetting must already be a valid length.

Added NuGet install instructions.