Added support for reading files in parts and pipe like input from stdin
Added support for reading files in parts and pipe like input from stdin

apackeer/amazon-glacier-cmd-interface,sirkubax/amazon-glacier-cmd-interface,gburca/amazon-glacier-cmd-interface,redbaron76/amazon-glacier-cmd-interface,uskudnik/amazon-glacier-cmd-interface,maliciamrg/amazon-glacier-cmd-interface,gidsg/amazon-glacier-cmd-interface