Don't track automatically generated .addin.xml files
Don't track automatically generated .fsproj files
Updated gui.stetic and generate.cs files

Containing the changes for RefactoringParametersDialog
Improve fetching mdtool path

On Linux mdtool is at /usr/bin/mdtool. Relative to MonoDevelop's
directory this is ../../bin/mdtool, and not ../../mdtool (which is
the case on MacOS).
fsharp-refactor submodule updated
Add extra projects to .sln file

The following projects were added:

  * FSharpRefactor
  * FSharp.CompilerBinding
  * MonoDevelop.FSharp.Gui

Note that this file is not in sync with
MonoDevelop.FSharp.windows.sln. Both should probably be generated
automatically, as is done with the .addin.xml and .fsproj files.
Add a reference to MonoDevelop.FSharp.Gui

Reference MonoDevelop.Refactoring. This file will need to be
generated to insert the correct version of MonoDevelop.