Removed the sysctl dep

It is currently not used, and rather not pull it into my repo if
not necessary.
Corrected Ubuntu dep based on the readme

The readme states it is intended for Ubuntu 12.10.  Since it
has not been tested on other platforms, corrected the metadata
supports line.

Bumped the minor version since this is not a bug fix, and changes
the "API" as to who is supported to consume the cookbook.
Merge pull request #5 from retr0h/retr0h/remove-sysctl-dep

Removed the sysctl dep
Merge pull request #6 from retr0h/retr0h/correct-ubuntu-supports

Retr0h/correct ubuntu supports
Added foodcritic and rubocop

This may not be a welcome patch, but I find it nice to use rubocop
on projects, to ensure they follow common coding practices.  I do
understand if you guys do not like the syntax changes, I didn't
at first either.  This does assume ruby 1.9+, which I believe
you guys are using.