Filtering posts without a page-score correctly - fixes #838

Added some code that might be filtering the posts without any pagescore correctly.
Please undo all these kind of space-removals (and possibly adjust your code style template in your IDE ?).
The WP coding standard actually specifies that array keys which are concatenated or are variables, should have spaces around them. Array keys which are strings shouldn't.
The only reason the sniff for this is currently disabled is that there are (were?) some bugs in the sniff.