Fix Fl_Tabs to use boxtypes exclusively for drawing the tabs. This results

in boxier tabs, but you can customize as desired.

Fix plastic box types when drawing larger boxes that would default to
the color (without any adjustment).

Don't need to build fluid files anymore for source distro - visual C
projects now create them as needed.

Changelog update.


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@1797 ea41ed52-d2ee-0310-a9c1-e6b18d33e121