Refs #703 Many improvements:

 * '-' can be specified as filename to read from stdin
 * --format is renamed to --log-format-name
 * --log-format-regex was added
 * user agent matching is now case insensitive
 * --enable-static added to track static files
 * --enable-bots added to track robots
 * --strip-query-string added to strip the query string (it was always stripped before, now it's not until
   this option is specified)
 * show help when the script is called with no filename


git-svn-id: http://dev.piwik.org/svn/trunk@6093 59fd770c-687e-43c8-a1e3-f5a4ff64c105