Improved debug and error messages when importing new tarball images.
Improved debug and error messages when importing new tarball images.

Signed-off-by: Josh Butikofer <03fff48ba28cbf47eb974f3204ba78b3ac131429@gmail.com>

basvanbeek/lxd,lxc/lxd,lxc/lxd,georghopp/lxd,jensg-st/lxd,Skarlso/lxd,erikmack/lxd,sl1pm4t/lxd,stgraber/lxd,benaryorg/lxd,yura-pakhuchiy/lxd,rcj4747/lxd,achanda/lxd,erikmack/lxd,mikemccracken/lxd,stgraber/lxd,dustinkirkland/lxd,Skarlso/lxd,chrisglass/lxd,stgraber/lxd,smoser/lxd,ericsnowcurrently/lxd,chrisglass/lxd,smoser/lxd,benaryorg/lxd,ericsnowcurrently/lxd,hallyn/lxd,sl1pm4t/lxd,erikmack/lxd,jumpstarter-io/lxd,akshaykarle/lxd,yura-pakhuchiy/lxd,benaryorg/lxd,yura-pakhuchiy/lxd,beni55/lxd,ericsnowcurrently/lxd,hallyn/lxd,beni55/lxd,dvbportal/osx-lxd,ollie314/lxd,jsavikko/lxd,mjeanson/lxd,akshaykarle/lxd,rcj4747/lxd,rcj4747/lxd,pcdummy/lxd,mikemccracken/lxd,achanda/lxd,basvanbeek/lxd,atxwebs/lxd,hallyn/lxd,techtonik/lxd,mjeanson/lxd,dustinkirkland/lxd,ollie314/lxd,jsavikko/lxd,jumpstarter-io/lxd,hallyn/lxd,rrva/lxd,jumpstarter-io/lxd,atxwebs/lxd,beni55/lxd,Skarlso/lxd,achanda/lxd,pcdummy/lxd,akshaykarle/lxd,lxc/lxd,Malizor/lxd,basvanbeek/lxd,Malizor/lxd,smoser/lxd,Malizor/lxd,jsavikko/lxd,pcdummy/lxd,hallyn/lxd,georghopp/lxd,dvbportal/osx-lxd,lxc/lxd,stgraber/lxd,jensg-st/lxd,sl1pm4t/lxd,ollie314/lxd,stgraber/lxd,jensg-st/lxd,chrisglass/lxd,stgraber/lxd,lxc/lxd,lxc/lxd,mjeanson/lxd,lxc/lxd,georghopp/lxd,techtonik/lxd,stgraber/lxd,dustinkirkland/lxd,dvbportal/osx-lxd,rrva/lxd,atxwebs/lxd,mikemccracken/lxd,Skarlso/lxd,rrva/lxd,techtonik/lxd,atxwebs/lxd,hallyn/lxd