- fixed duplication detection when attaching documents, compare on non
cached url
- skipping tweet older than a given number of tweets. (E. g. to skip old
user status)
- switched skip date calculation to long due to int overflow
- much quicker (non ocl) implementation for frequently used finding an
item with an identifier
- flag to switch off caching for an attachment
- duplicating list when looking for identifiers, caus frequently used
and likely to produce concurent modification at some time
- quicker implementation for getting meta tags by name