Update gem authors and emails

I've put a hefty amount of work into this project, and I don't think
anyone's going to mind me mentioning that.

Change-Id: Ifc07bac3e7fbf1168a6fde2272ac27d43ca808c4
Reviewed-on: http://gerrit.causes.com/35617
Reviewed-by: Shane da Silva <shane@causes.com>
Tested-by: Shane da Silva <shane@causes.com>
Reopen STDIN when Overcommit isn't installed

Git hooks are not run in an interactive context, meaning STDIN isn't a
TTY and so we can't read user input.

The solution to this is to reopen STDIN to manually wire up a TTY.

Change-Id: Ia12c5cceba26d95313bdf1b1f9d271ef3a421248
Reviewed-on: http://gerrit.causes.com/35618
Reviewed-by: Shane da Silva <shane@causes.com>
Tested-by: Shane da Silva <shane@causes.com>