changed db classes to use a standard pxdb format
  added interfaces
moved $conn from dbPreparedclass to dbPoolConn class
data fetching, connection cloning, and a few other things need to be finished yet

git-svn-id: http://prositemanager.googlecode.com/svn/trunk@95 e374cdb8-7ee8-0d77-fd1e-c554042f9154
added HARD_LIMIT_ROWS to DataTables class
minor fix in config.php.original

git-svn-id: http://prositemanager.googlecode.com/svn/trunk@96 e374cdb8-7ee8-0d77-fd1e-c554042f9154