to_png backward compatibility
Merge branch 'png' of github.com:PP-TSD/sdgen into png
font style aliases added
Merge branch 'png' of github.com:PP-TSD/sdgen into png
group header config improved
test_all output dir moved to examples/output
font searching improved: aliases added, searching for subword of font name in font files names (example: Times New Roman -> times.ttf)
short group test added (header longer than body)