Remove repeated code in 2 functions for splineutil.c
prep SplinePointCreate() for possible error if (future) chunkalloc fails
Fix https://github.com/fontforge/fontforge/issues/785
Make SSRegenerateFromSpiros() more robust against problem spiros

Before discarding prior splineset, create new data, then release old data.
Merge pull request #787 from JoesCat/master

libspiro improvements to prevent crashes and segfaults
don't resize hvbox smaller than minwidth/minheight
Merge pull request #788 from coolwanglu/master

Don't resize hvbox smaller than minwidth/minheight
fix a few errors in GHVBoxResize
fixing resize for ghvbox
..
remove excessive debug message
Merge pull request #793 from mskala/rm-hotkey-msgs

remove excessive debug message
Updated Polish translation.
Merge pull request #791 from coolwanglu/master

More fix for GHVBox
Fix #785
Fix default copyright string
Make debug mode give informative error message when lldb not available
Fixing copyright string
Swap 'flip' and 'rotate' in the Char View Tools palette
Move Knife and Ruler up in the Char View Tools Palette