Progressively collect data to prevent hang when data from autopkg exceeds NSTask/Python max buffer size.
Progressively collect data to prevent hang when data from autopkg exceeds NSTask/Python max buffer size.

ftiff/autopkgr,eahrold/autopkgr,eahrold/autopkgr,lindegroup/autopkgr,ftiff/autopkgr,lindegroup/autopkgr,HyppHere/autopkgr,lindegroup/autopkgr,lindegroup/autopkgr,HyppHere/autopkgr,HyppHere/autopkgr,ftiff/autopkgr,lindegroup/autopkgr,eahrold/autopkgr