Git hooks

[IonicaBizau]

• Fixes track new commits via global hook instead of git command rewrite #4. Use git hooks to track git commits automatically.
• Fixes Catching git-commit from zsh #1. Since we use git hooks, this probably will be fixed too. Needs to be tested! ❗

[IonicaBizau]

@Flyingmana @atuttle @rambo-panda Now the scripts directory contains the init-git-post-install script, created following the @venables tutorial (thanks!). Run it on your machine and it will add the post-install git hook on your computer.

So, it will catch the successful git commit commands. I'm not sure, but this could catch even the non-commands (e.g. committing from UI).