building src/graphics/...

[John W. Eaton]

On  5-Jun-2008, Shai Ayal wrote:

| I see no reason not to move them.
| I used a separate dir for the fltk_backend to allow for faster builds
| during development if only ftlk_backend.cc is changed, but the file
| has more or less stabilized and changes are as likely to occur as
| other files in the src dir.

OK, I checked in a change to move them and eliminate the src/graphics
subdirectory.

jwe