Add two useful scripts for devs

These are scripts I use when working with Rudder:

  1. The first one, rudder-update-all-branches, is basically a shortcut for doing git checkout/git pull on all currently supported branches, and not forgetting to fetch tags, and reminding you of commands to run to do a merge.

  2. The second one, rudder-make-branch-from-ticket, takes one argument that is a ticket ID from the Rudder Redmine. It will get that ticket, check it's type, and make a new git branch for you with the correct naming convention to make a pull request from, then remind you of the commands to run

Both can be significantly improved, and should be - feel free!