Corrected errors in iterators
Constructor of ZipArchive with a File object as an argument
Bug fix in import to sequence file
Import of PDF's without metadata
Keywords extraction - changes in languages support
Merge branch 'master' of git://github.com/CeON/CoAnSys
Merge pull request #97 from acz-icm/master

Importers bug fix; import pdfs without metadata; fix in keywords extraction