93_DbLog.pm: Changes only for SQLite
- Moves the 'current' table to memory and modifies a few internal parameters 
  in SQLite to minimize flash wear.
- Makes easier to setup DbLog with SQLite. Database tables are created if not exists 
  automatically when the database is opened.



git-svn-id: https://fhem.svn.sourceforge.net/svnroot/fhem/trunk/fhem@2855 2b470e98-0d58-463d-a4d8-8e2adae1ed80
reorder code, up/down dimmer, blind supervice VD

git-svn-id: https://fhem.svn.sourceforge.net/svnroot/fhem/trunk/fhem@2856 2b470e98-0d58-463d-a4d8-8e2adae1ed80