Update to SugarCRM 6.5.18

I guess the SugarCRM Company just forgot about the community behind
SugarCRM 6, and now even their git repository is updated to the latest
release, so I took the latest open release and I merged the changes made
to it into a new SugarCRM EE (Enhanced Edition), I'm planning update the
project, fix some know bugs, make some improvements that I found in 4
years working every day with this CRM and update this to make it
compatible with the latest technologies like PHP 5.5 and above.