plug #245 log rotate with setTimedFilename
remove unused glob member
move public method before protected ones
switch from setTimedFilename to setFilenameFormatParams
change name according to Seldaek recommendation
address second comment on using str_replace instead of printf for setting filename format expression
Merge pull request #267 from cordoval/feature/logrotate_flexible

plug #245 log rotate with setTimedFilename