Remove unused files and checkin new version of db_generate.sql in preparation for a release. It contains all the upgrades up to 0.17-compat-18, plus the escaping upgrades, plus the manual removal of the default project (which is no longer needed thanks to cleaner code)

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1860 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9