Cast stdClass before attempting to overload $bp global

See #26. Props imath
Don't use $wpdb->prepare when it's not necessary. See #26
More variable casting. See #26
Rearrangement of template code

Also fixes a bug with activity pagination and already-rated reviews

See #26. Props imath
Whitespace
Readme update
Bumps tag to 1.3.2
Merge branch '1.3.x'