Added new drivers: Versaterm (Mac), and VLT (Amiga).  Tek4107 driver improved to actually work on a real tek 4107 (contributed by Paul Kirschner), and the driver keyword changed to "tek4107t" or "tek4107f" (was "t4107t" or "t4107f").  Introduced idea of minor devices -- each variation on the tektronix instruction set is a new minor device.
Added new drivers: Versaterm (Mac), and VLT (Amiga).  Tek4107 driver
improved to actually work on a real tek 4107 (contributed by Paul
Kirschner), and the driver keyword changed to "tek4107t" or "tek4107f"
(was "t4107t" or "t4107f").  Introduced idea of minor devices -- each
variation on the tektronix instruction set is a new minor device.

Added support for: color map 1 color selection, color map 0 or color map 1
state change (palette change), polygon fills, both solid and pattern (use
negative fill pattern number to get hardware pattern).  Color map now set
FROM PLPLOT!!  May require some additional effort to work for all minor
devices.

All drivers: cleaned up by eliminating extraneous includes (stdio.h and
stdlib.h now included automatically by plplotP.h), extraneous clears
of pls->fileset, pls->page, and pls->OutFile = NULL (now handled in
driver interface or driver initialization as appropriate).  Special
handling for malloc includes eliminated (no longer needed) and malloc
prototypes fixed as necessary.

svn path=/trunk/; revision=711

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot