Updated cookbook to support CentOS 6.2 and now installs Graphite 0.9.10.

Updated to support CentOS (Tested on 6.2) while maintaining Ubuntu support
Updated to support Graphite 0.9.10
Attributes added: Web app timezone, data dir
Added template to create init scripts for both Ubunut/CentOS
Updated the apache site template
Auto-starts memcached if it's stopped for some reason.
Updated various templates to be in line with the ones included in 0.9.10
Other misc improvements