[MonoDevelop] Project / Solution Terminology

[Scott Ellington]

I think it might be helpful to clarify the use of terminology in
MonoDevelop.  A Solution is a group of projects.  However there are
several instances of inconsistent use of this terminology.  For example,
the templates in the "New Solution Window" all use the term "Project".
(i.e. "Console Project").

In addition, the "Combine" term is still used in certain places.  Such
as the "Combine Options" window.  This all might be a little confusing
for users, so if people are okay with it, I will create a bug for
tracking and fixing issues of incorrect terminology.

I will go ahead and fix the Welcome Page which is a glaring offender.

Scott