First pass at being able to "resolve" (consruct) targets at runtime.
First pass at at defining an alias attribute for "target types" (classes that contain Verb methods) for use with the multi parser
Added the ability to look up targets by the 'TargetAlias' attribute, and refactored the logic for finding the taget by name/alias into the ParserRegistration class.
Merging in from main CLAP project following some pull requests being merged.
Merge pull request #25 from appakz/master

Modifications for working with multiple targets