Lookups/GPOS/AddSubtable dialog bigger, reveal controls

Make the Lookups/GPOS/Add Subtable dialog slightly bigger to expose
some previously hidden controls.

Making the dialog taller exposes the "OK" and "Cancel" buttons that
were previously hidden down below the dialog window's bottom border.
Making the dialog a bit wider exposes the rest of the vertical scrollbar
which was only half visible (under cygwin).

Steps to reproduce are in issue #1446, "GPOS Anchor classes "Add Subtable"
dialog too short"
Merge pull request #1565 from tshinnic/lookups_gpos_addsubtable_bigger

Lookups/GPOS/AddSubtable dialog bigger, reveal controls
Add comments in various overlap routines.
Fix output SplineSet direction in JoinAllNeeded when we have constructed the SplineSet backwards.
Disable verbosity in splineoverlap.c.
Merge branch 'master' into overlap_exploration_5
Fix output status for _ExportGlif.
Merge pull request #1567 from fontforge/issue_1540_frank_1

Fix output status for _ExportGlif.
Merge pull request #1566 from fontforge/overlap_exploration_5

Reverse reversed spline sets when removing overlap.
When creating an anchor point, go to the correct pane in the Font Info box.
Avoid checking MIME types of pipes and devices.
issue783: osx, detect if fontforge.app is in the right location on disk
Merge pull request #1570 from monkeyiq/2014/aug/issue783

issue783: osx, detect if fontforge.app is in the right location on disk
Make the rendering of the stroke outline *almost* transparent when in preview mode.
If you try to make it fully transparent then you will find that it is fully opauqe instead.
So it is now at 1/255 = 0.4% opaque, which I can't see when rendered even if the colors
are bright green or red.
Merge pull request #1568 from fontforge/anchor_point_fontinfo_destination_fix_1

Correct Font Info pane when creating an anchor point.
Merge pull request #1569 from fontforge/issue_1564

Avoid checking MIME types of pipes and devices.
Merge pull request #1571 from monkeyiq/2014/aug/1217

Make the rendering of the stroke outline *almost* transparent when in preview mode.