Added "AutoBundling" feature code (did not enable)

I've dropped off code for the AutoBundle feature we discussed. I
recently uninstalled VS2010, so I did not commit my changes to the
project file (1 assembly reference and 2 new files in project).
Additionally I commented the methods added to
SquishIt.Mvc.HtmlHelperExtensions. Also note the code is currently
inaccurate in the order in which it emits resource links. I'm in the
process of modifying how strings are collated to support removing
duplicate bundles.
include autobundling files in project, remove some VS 2012 references
Resolve 3 AutoBundler initial integration defects

Resolved bundle output path failure, resulting from failure to call
ViewPath-to-BundleFileName mapping function
Resolved Bundle duplication defect (unrelated to intended de-duplication
feature)
Resolved the IDE-only "error" that the generic parameter types could not
be identified.
Comments and clarification
Added AutoBundler HtmlHelperExtensions

The AutoBundler extensions were disabled on initial commit because of VS
solution compatibility issues. Uncommented that code.
calculate auto-bundle name from the names of files it contains (#267)