Make some changes to make it runnable with ui-refresh.
add missing dependencies: xwt.
bring back some code for ui-refresh. (tooltip still does not seem to work though).
revert local hack build path.
Use 4.0 profile to be able to run on mono. 4.5 is not in md on mono 2.10 yet.
Merge branch 'ui-refresh' of github.com:xamarin/fsharpbinding into ui-refresh
if unknown build action was found, just ignore it, like C# addin does.

This fixes build issue at InterfaceDescription in MonoMac project.
Update README.md
Fix to allow different flavours of build type to filter downstream, currently the binding throws exceptions so that any other components, i.e. MonoTouch wont get a chance to execute.
switched printfn to a Debug.WriteLine, we dont want the release version doing printfn
Added Debug.WriteLine information around the findMonoDocProviderForEntity, added a function to catch errors coming from helpTree.GetHelpXml and wrame with None|Some.  This was causing MonoDevelop to terminate with a unhandled exception.  Ideally GetHelpXml should be addressed to return the correct documentation is possible, I notice that GetHelpXml is marked as obsolete too
Fix excetion on tool tip

Previously we returned just the raw summary is an empty string was
returned.  The problem is an empty string is returned from
GetDocumentationMarkup if the phrase "To be added" is found by the
GetDocumentationMarkup method.  See:
https://github.com/mono/monodevelop/blob/master/main/src/core/MonoDevelo
p.Ide/MonoDevelop.Ide.TypeSystem/AmbienceService.cs

The best thing to do here is simple return the emty sting as we have no
documentation anyway.
remove spurious / in fsharp executable path
fix byte-compilation warnings in fsharp-mode-completion
namespaceify load-project, add tests, store current project
simplify conditionals in fsharp-mode, revert fsharp-mode-indent
add `all` task to makefile
refactor handlers into separate functions, begin work on popup
display tooltips with popup and typesigs in minibuffer
add makefile task for downloading packages