New guide section on Git and GitHub

[Andrew Moore]

> On Apr 11, 2018, at 7:52 PM, Dave Horsfall <dave at horsfall.org> wrote:
> 
> On Wed, 11 Apr 2018, Andrew Moore wrote:
> 
>> Okay, so when all is said and done, am I actually prepared to make an actual contribution?  Perhaps it merits a topic of discussion for the online meeting how MacPorts wants to present itself.  I’d like to see one of MacPorts’s goals be towards non-profit status, and ultimately to attract the attention of Apple again.  Apple needs MacPorts desperately, they just don’t know it yet…
> 
> Having (re)discovered Perl/Tk I'm certainly interested in jazzing up a few of my programs, but there's something about GitHub that bothers me (and I don't know what); perhaps it's my general dislike of Penguin/OS and anything spawned from it (including the GPL virus), I dunno…

I should clarify that I speak for myself and not for MacPorts, not being a member.  And my reference to Trac probably came across as derogatory, which was unintended.

I’m curious if your dislike extends to command-line tool git(1) or just the company built around it?
-AM