bfs_tools: License clarification to MIT.

* Consulted with Axel D. via IRC to confirm license desires.

gcc4 build fixes.

Imported BFS-Tools (without docs), added bfsinfo to the image.

* The sources are unchanged, and most of it doesn't follow Haiku's coding
style -- stuff that I updated over the years might also have seen a coding
style update.
* This was also the basis on which Haiku's BFS has been written.
* In the long run, the stuff in 'lib' that is already part of BFS should
be removed, and used directly from BFS itself.
* I haven't yet added any other of the tools to the image. Not sure if they
are ready for inclusion yet; 'recover' could also be renamed to reflect that
it is BFS specific.

gcc4 build fixes.

Imported BFS-Tools (without docs), added bfsinfo to the image.

* The sources are unchanged, and most of it doesn't follow Haiku's coding
style -- stuff that I updated over the years might also have seen a coding
style update.
* This was also the basis on which Haiku's BFS has been written.
* In the long run, the stuff in 'lib' that is already part of BFS should
be removed, and used directly from BFS itself.
* I haven't yet added any other of the tools to the image. Not sure if they
are ready for inclusion yet; 'recover' could also be renamed to reflect that
it is BFS specific.