This is the third of a sequence of changes (see also 3dd1f2bf and f2cac222).
In this change we start consuming the custom type info (effectively just
the flags of DynamicAttribute packed into a byte array) associated with
locals declared in the Immediate window.

TODO: The GetAliases API has not been implemented, but this functionality
will light up when it is.

Prior to this commit, they were identical to the corresponding desktop
(i.e. NetFx20) assemblies but now all the pieces are in place to compile
them as portable assemblies.

Cleverness: Move resources into the portable projects and link them into
the corresponding desktop projects.  The desktop projects can compile
portable designer files, but not vice versa.