Create class to parse an xcode workspace

This class allow to parse a workspace and get all informations about
projects contained in this one
Import RMBlurredView to get a blurred background on nsview
Adds a view to list all projects contain in a workspace
Set a way to disable interaction on the map
Linked tabView in XLocation controller
Workspace management

Let the user choose in which projects (contain in the workspace) he'd like to add the gpx file
Update README
Allow to quit the view pressing 'escape' key
Adds keys shortcuts for workspace view