Add entry for enabling the svgomg output
Make label for usesmartobject consistent
New flags, refactor, info link

- Add new flags for pngquant, CopyCSS and Convert Color
- Re-factor so HTML for flags is generated dynamically
- Add the "more information" link.
Bump version number (for AdobeExchange)
Minor layout improvements
Set version minimum to 15.2
Merge remote-tracking branch 'origin/jp/svgomg'