Multiple fixes

The second PR from issue #44. This contains several unrelated small fixes.
* **storage.conf** template merged with my changes, added support for **Regexps** (https://github.com/hw-cookbooks/graphite/commit/924a107, https://github.com/hw-cookbooks/graphite/commit/feb326e).
* **README** file fixes and improvements (https://github.com/hw-cookbooks/graphite/commit/a8048fb, https://github.com/hw-cookbooks/graphite/commit/2109e20, https://github.com/hw-cookbooks/graphite/commit/441135a, https://github.com/hw-cookbooks/graphite/commit/8763400).
* Service **notifications** improved (https://github.com/hw-cookbooks/graphite/commit/0562405, https://github.com/hw-cookbooks/graphite/commit/2738893).
* **Attributes separated** into multiple files (https://github.com/hw-cookbooks/graphite/commit/675c3f4, https://github.com/hw-cookbooks/graphite/commit/12fce36).
* RedHat/CentOS **init scripts** fixes (https://github.com/hw-cookbooks/graphite/commit/9a58277, https://github.com/hw-cookbooks/graphite/commit/ba2814b).
* Removed brackets from **bats tests** (https://github.com/hw-cookbooks/graphite/commit/b444c83).
* `foodcritic` (https://github.com/hw-cookbooks/graphite/commit/c6f7c4f, https://github.com/hw-cookbooks/graphite/commit/2256628).

Bonus:
* Fix: apache2 VirtualHost **"Address already in use"** (https://github.com/hw-cookbooks/graphite/commit/70de533).
* Fix: **"cannot determine user id for apache"** in CentOS (https://github.com/hw-cookbooks/graphite/commit/9700c84).

I had to fix the last two to make the tests pass and make sure the other commits worked.