update(docs): Better docs for build_script.sh

I updated docs for `build_script.sh` and enhanced them a little bit so
they're now more comprehensive, have better examples of usage and
documentation of command line options.
update(docs): Better docs for setup.sh

Docs for setup.sh now contain more comprehensive CLI descriptions, usage
examples, and fewer typos :)
Rename dev reqs for RTD
fix(docs): update build/setup scripts examples
fix(docs): exec. shell scripts, directory listing

I added a few notifications about using executable scripts for
build_wheels.sh and setup.sh.

Setup.sh now contains new sections: directory listing (after GWM
installation) and almost empty troubleshooting.
Make bash script link ref to setup-script docs
build-script.rst: Fix grammar
Merge branch 'pbanaszkiewicz-fix/documentation_gsoc' into develop

* pbanaszkiewicz-fix/documentation_gsoc:
  build-script.rst: Fix grammar
  Make bash script link ref to setup-script docs
  fix(docs): exec. shell scripts, directory listing
  fix(docs): update build/setup scripts examples
  update(docs): Better docs for setup.sh
  update(docs): Better docs for build_script.sh
Add Vagrant and chef config to GWM.

refs #15123
Add gwm attributes to Vagrant file

refs #15123
Set debug to true in vagrant role

refs #15123
Vagrant working with bootstrap of user

refs #15123
Add docs about Vagrant.

refs #15123
Merge branch 'feature/15123' into develop

* feature/15123:
  Add docs about Vagrant.
  Vagrant working with bootstrap of user
  Set debug to true in vagrant role
  Add gwm attributes to Vagrant file
  Add Vagrant and chef config to GWM.
Update Berkshelf to use osuosl-cookbook repository

Update Vagrant documentation
Pin chef version for Vagrant
More detailed Vagrant documentation
Add berksfile.lock for vagrant/chef
re-arrange document structure
re-arrange docs structure, add process docs

Major additions to:
- dev guide
- process docs