Added infrastructure / tests for IMixinDependency
Fixed bug in tests
Initial work on IMixinDependency - Checking if dependency is preset and adding if it is interface
Addition MixinDependency tests
Fixed typo in documentation
Documentation
Updated to more accurately reflect the real pMixin infrastructure (MasterWrapper is passed an IRequirements type, not the actual Target type)
Merge - Copyright (+1 squashed commits)

Squashed commits:

[fc19b82] Infrastructure for Mixin Dependencies
Removed debug code
Fixed bug in test
Added correct error logging for Mixin Dependency and fixed spelling mistake in Error Message id
Fixed bug - forgot to return false on errors
Updated tests / test infrastructure
Merge branch 'master' into master-pmixins.Mvc
Added link to Stack Overflow article
Created ConversionOperator recipe
Upgraded pMixins plugin
Added view for Casting and Conversion Operations Recipe