Prefix ATTS_STRIP_EMPTY.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5791 2fea6a4d-a838-0410-917b-93a53c48e9d2
Prefixed language constants.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5792 2fea6a4d-a838-0410-917b-93a53c48e9d2
Prefix script constants.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5793 2fea6a4d-a838-0410-917b-93a53c48e9d2
Remove error suppression from constants.php.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5794 2fea6a4d-a838-0410-917b-93a53c48e9d2