Rethink internal 'design' of git-secret

[joshrabinowitz]

There's some things about git-secret's build system that are weird
(one packager called git-secret 'very badly designed')

Let's make a list of things that could be clearer/simpler/more consistent with typical packaging:

• don't: append multiple files together from src/ to create a single git-secret script
  ** If we're going to append all the files together anyway, perhaps we should just have them that way in git

• setting up the temp directory used for testing git-secret
  ** if you try to run the git-secret tests manually from the git checkout (IE without using the Makefile), everything goes haywire

• if a test fails, a weird string of 'find' errors might get output, see Fix tests when run from git hooks #334

• other things? Ideas for improved architecture/packaging of git-secret welcome.

[sobolevn]

Maybe we can ask @jirutka directly about what can be improved?
Feedback is always a good thing.

[joshrabinowitz]

See #319

[joshrabinowitz]

See also https://wiki.debian.org/UpstreamGuide (mentioned in #312 )

[joshrabinowitz]

I think one thing people think is weird is concatenating the sources together into git-secret