publisher category did not get included in regular search.
added publisher "exists (select ..." as 4th or branch to SQL_BOOKS_QUERY

added argument placeholder as 4th to the various calls to getBooksByQuery.

re #123
Ignore some new files
Add a new config item to ignore a category in search. Simplify the queries. re #123
New test for the previous configuration item. re #123
Merge branch 'master' of git://github.com/At-Libitum/cops

Conflicts:
	base.php - resolved