[KDev4] vcs integration - KUrl of a file is not enough to know the file's project!

[Branan Riley]

Let me make sure I've got this:
* Aegis requires all changes to be made in a change-set of sorts
* You can't make changes in a base area

Listing which files are part of a project is part of the project
plugin, right? So why not just let the aegis plugin do something like
this for that list:

[root]
|--Trunk
|  |--File 1
|  `--File 2
`--Change Set
   |--File 1
   `--File 2

Another thing with this is that you could have a little popup upon
opening a file in Trunk asking if you want to open it read-only or
create a new change set. You can of course also do it all from the
contex menu (which I hope is accessible to plugins?)

Branan