[metapost] groff support for MetaPost (and vice versa)

[Taco Hoekwater]

Michail Vidiassov wrote:
> 
> WHAT WILL BE NEW IN THE NEW RELEASE?
> 
> (or should be, or may be, or can be ;)

will be (unless a fatal error occurs):

* the groff & DSC patches/fixes
* font subsetting/reencoding
* output filename templates
* new 'turningnumber' code
* a compiled makempx (instead of shell script)
* fix for the web2c array parameter bug

should be, but probably wont:

* graph.mp fixes
* totally bugfree envelopes

can be:
* ??

Cheers, taco