phppgadmin was added

(cherry picked from commit 2cad4583ae172f0fa285ef47bc2e16a9fc34e93f)
Updated package to be a bit more Nitrous.IO

* Changed dependencies
* Modified install method to mv phpPgAdmin into www/
* Updated Tips
Merge pull request #170 from nitrous-io/phppgadmin

Phppgadmin