remove unused lib/storage.hh
Remove storage from setup.py
Merge pull request #340 from ged-lab/fix/delete-readmask

remove unused lib/storage.hh
force remove old zlib Makefile
remove the unused KTable object

Rename ktable.{cc,hh} to kmer_hash.{cc,hh}, purge remaining references
Fix syntax error in preprocessing
Merge pull request #337 from ged-lab/fix/remove_KTable_class

remove the unused KTable object
Merge branch 'master' into sweep_opts