- Correct bug when running git update-requirements when there are more than 2 requirements files in the repo.

- Add more Ansible configuration options via environment varible because ~/.ansible.cfg is not read if there's an ansible.cfg present in the current directory.

- Fix bug with SSH config generation, order was not correct (keep safe handling of unusual filenames).

fixup! - Removed install script, found a much simpler way to install. Updated README accordingly. - Reverted OSX TravisCi test since the only test is using pre-commit now.

- Added Documents/bin directory for scripts, moved renew-certs,
train-wifi and dma-clean (wasn't commited before) there.
- Made gen-ssh-config a script (in Documents/bin) instead of a shell
alias. Call said script in the post-merge git hook (instead of sourcing
bashrc which currently just exits if not running interactively which I
like to keep doing). Added said scripts to pre-commit.

git hook).
- Fix issue with failure to source bashrc in the post-merge git hook
(file not found issue).

- Replace dashes with underscores in shell function names, sh doesn't support dashes in function names (not happy about the inconsistency, but it'll do for now).

- Updated list of shell script to check with pre-comit.
- Renamed train-wifi.sh to train-wifi .

- Added update-requirements Git alias (same as the update-requirements shell alias but also commits the changed files.)

simpler shell alias to just update the requirements files without any
Git.