Fixed issue with cleaning and appending new ids into tag file
Fixed issue with removing tag files on cleaning not existed tags
Merge pull request #18 from tarasovvl/master

Fixed issues with unproper processing of tag files
Would have sworn I replaced the adler32 algorithm with md5 already..
Merge branch 'master' of https://github.com/colinmollenhour/Cm_Cache_Backend_File