Issue #1275104 by ELC: rm hook_install, fix spacing, default to on.

hook_install() just set variables to defaults with no purpose - removed.
Removed some extra spare lines at end of .module file - no real change.
Module now defaults to ON once Acc ID has been added instead of OFF. This
 is to prevent confusion with people transferring from the current zipped
 version of the module to the d.o hosted version, as the zipped version
 did not have this on/off switch.
Also fix format of CHANGELOG and made it 7.x specific