transplant recent backend changes into 3.2.x?

[Ben Abbott]

Jaroslav/others,

In the last four weeks, there have been quite a few bug fixes that effect the 
gnuplot backend. In the middle of these changes the m-files were untabified 
which makes the job of transplanting them to the 3.2.x branch more difficult, 
but I thought I'd check to see if these should be transplanted anyway.

Ben

Fix the order of calling setdata and setvertexdata for patches (bug #29549)
http://hg.savannah.gnu.org/hgweb/octave/rev/4f2e46473153

__go_draw_figure__.m: Hidden axes may have visible children.
http://hg.savannah.gnu.org/hgweb/octave/rev/046b713d21dc

print.m: Set figure color property to 'none' when printing.
http://hg.savannah.gnu.org/hgweb/octave/rev/79410269cd21

graphics.h.in: Have figure color property support a radio value, 'none'.
http://hg.savannah.gnu.org/hgweb/octave/rev/5475da58d39f

Make the default axes color none (bug #29060)
http://hg.savannah.gnu.org/hgweb/octave/rev/2880a862b1a8

Correct fill of diamond markers for gnuplot backend
http://hg.savannah.gnu.org/hgweb/octave/rev/f5a652a101b0

__go_draw_axes__.m: Consistent placement of axes for ps vs other gnuplot 
terminals.
http://hg.savannah.gnu.org/hgweb/octave/rev/5f46cc552ce5

Fix colorbar() bugs for manual plotboxaspectratio.
http://hg.savannah.gnu.org/hgweb/octave/rev/23c1910dbd8e

axis.m: For 'axis normal' restore plotboxaspectratio.
http://hg.savannah.gnu.org/hgweb/octave/rev/e86651d2fde5

Untabify m-files

colorbar.m: Allow 'peer' option to be specified.
http://hg.savannah.gnu.org/hgweb/octave/rev/eb55e736060e

colorbar.m: Consistent treatment of plotboxaspectratio. Add listener for 
plotboxaspectratiomode.
http://hg.savannah.gnu.org/hgweb/octave/rev/568c7c041fac

__actual_axis_position__.m: Fix bug when restoring figure position property to 
its original value.
http://hg.savannah.gnu.org/hgweb/octave/rev/114376c7cba5

plotyy.m: Add listener for dataaspectratiomode.
http://hg.savannah.gnu.org/hgweb/octave/rev/7147078550fe

Unset figure color in __go_draw_axes__ (partial fix for bug #29060)
http://hg.savannah.gnu.org/hgweb/octave/rev/6a2e4e464d38

loglog.m: Minor ticks on by default for loglog plots.
http://hg.savannah.gnu.org/hgweb/octave/rev/153e6226a669

Respect the nextplot property value of 'new' for axes and 'replacechildren' for 
axes and figures.
http://hg.savannah.gnu.org/hgweb/octave/rev/62ebba45054e

__go_draw_figure__.m: Don't set background for non-visible axes.
http://hg.savannah.gnu.org/hgweb/octave/rev/424795ef82b8

Respect the nextplot property value of 'new' for axes and 'replacechildren' for 
axes and figures.
http://hg.savannah.gnu.org/hgweb/octave/rev/62ebba45054e

graphics.h.in: Fix nextplot property values.
http://hg.savannah.gnu.org/hgweb/octave/rev/82ee24bf783c

__go_draw_figure__.m: Untabify.
http://hg.savannah.gnu.org/hgweb/octave/rev/169be980faf9

print.m: Provide default suffixes & validate hardcopy format.
http://hg.savannah.gnu.org/hgweb/octave/rev/944aa97069ed