- Added "browse" buttons and managed their enabled property

- Added messagebox to show to the user the status of the reconfiguration (success/failure)
Functionnal browse button for choosing the xmlRememberedProjectsPath.
- Removed bug in createRememberedProjectsXMLSheet.
- Removed vtkCreateListOfRememberedProjects
- Updated vtkProjects::saveProjectsInList to use createRememberedProjectsXMLSheet
instead of vtkCreateListOfRememberedProjects
Modified function vtkWriteXMLDomToFile to include a DTD.
Fixed bug in vtkProjects::vtkModifyRememberedProjects

- Function didn't work with one optional argument. Now it does.
Project folder browse button now functional !
Functional "project relative XML path" browse button !

- Added function from the internet in vtkPathUtilities to compute the path of
  a folder/file relatively to another?

- Removed "choice of template path" button. Not in the acceptance tests.
Old RecreateConfigurationForm deleted and replaced by the new one.

Add-in regenerated and willing to be tested.