! Convert unzip to a class, fix for stored objects
that would cause extraction failures due to extra signatures
! Lets validate the crc since we have the data to do so
! dont check crc unless we should
! cleanup some substr calls
! add public check zip method
! clean up docblocks
! new unTgz class for extracting .tgz or .tar.gz
! use the new untar class in the package subs
! touch of cleaning
! handle cases where miscreant data is stored
Merge pull request #1930 from emanuele45/extract

Extract