Patch on ROL-1789 (don't show category dropdown if only one category present), and fix for ROL-1988 (searches for categories with a space in them weren't working.  Also, I removed the name of the category and locale from consideration when doing basic text searches, as well as the seldom needed dictionary.com definition search for search terms.

git-svn-id: https://svn.apache.org/repos/asf/roller/trunk@1609483 13f79535-47bb-0310-9956-ffa450edef68