Revision 305215

- Update to version 0.7.1
- Convert to optionsNG
- Add LICENSE
- Take maintainership

While I'm here:

- Don't link to ImageMagick when IMAGEMAGICK=off
- Trim Makefile header
- Add missing deps
- Port needs pkg-config during build

PR:		ports/171952
Submitted by:	nemysis <nemysis@gmx.ch>