fixes in installation

-Campaign Status label fixed (before was only 'Status')

-Now when you create a Product, have "active" checked in default.

-Updates against strict standards

-Install: in recommended settings now have more coherence: "Yes" - "Yes" values in table.

-Install: We should put a min version for PHP instead max version (Now 5.4?)

-Install: fixed checkbox that was failing after you submit and then went back (Can be better coded since I didnt code as an event)