src/gfxcore.cc: Don't default to percent gradient.
src/gfxcore.cc,src/gfxcore.h: No need to dynamically allocate
m_Pens.
lib/Makefile.am,lib/make-pixel-font,src/glbitmapfont.cc,
src/glbitmapfont.h: Embed the font data for the first 256 Unicode
codepoints into the compiled aven binary to reduce start up
overhead.  Any additional codepoints are loaded from a data file
only if/when a character >= U+100 is actually needed (as before).
NEWS: More changes for 1.2.11.
Update to dh compat level 9 to enable use of hardening flags.
Add debian/upstream-signing-key.pgp to debian/source/include-binaries