lxc-download: Add interactive mode
lxc-download: Add interactive mode

Signed-off-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>
Acked-by: Serge E. Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

terceiro/lxc,JohnPeacockMessageSystems/lxc,jirislaby/lxc,rowhit/lxc,ioops/lxc,ojkastl/lxc_Patches,efiop/lxc,weizhenwei/lxc,yubo/lxc,federicobriata/lxc,terceiro/lxc,Ponce/lxc,ecarrara/lxc,GreatFruitOmsk/lxc,Ponce/lxc,thmo/lxc,federicobriata/lxc,ioops/lxc,ksperis/lxc,lazy404/lxc,LynxChaus/lxc,hfuCN/lxc,ss1h2a3tw/lxc,ysbnim/lxc,aeris/lxc,rldleblanc/lxc,QingweiPeterLan/cs188-lxc,rldleblanc/lxc,bmoar/lxc,cjwatson/lxc,sapun/lxc,DarknessBeforeDawn/lxc,ksperis/lxc,weizhenwei/lxc,yubo/lxc,ecarrara/lxc,cjwatson/lxc,sapun/lxc,virajs/lxc,raspberrypython/lxc,yubo/lxc,GreatFruitOmsk/lxc,hallyn/lxc,thmo/lxc,ecarrara/lxc,cjwatson/lxc,Ponce/lxc,LynxChaus/lxc,rldleblanc/lxc,akshaykarle/lxc,bostjan/lxc,ioops/lxc,ss1h2a3tw/lxc,szaszg/lxc,rowhit/lxc,regit/lxc,caglar10ur/lxc,codebauss/lxc,federicobriata/lxc,raspberrypython/lxc,efiop/lxc,fwilson42/lxc,aeris/lxc,tych0/lxc,major/lxc,DarknessBeforeDawn/lxc,Pelagicore/lxc,ysbnim/lxc,jirislaby/lxc,weizhenwei/lxc,raspberrypython/lxc,regit/lxc,tych0/lxc,JohnPeacockMessageSystems/lxc,tych0/lxc,major/lxc,akshaykarle/lxc,fwilson42/lxc,ojkastl/lxc_Patches,bmoar/lxc,lisongmin/lxc,hkjolhede/lxc,lazy404/lxc,armcc/lxc,virajs/lxc,ksperis/lxc,lisongmin/lxc,bmoar/lxc,bostjan/lxc,caglar10ur/lxc,armcc/lxc,Pelagicore/lxc,christiaan/lxc,lazy404/lxc,ss1h2a3tw/lxc,QingweiPeterLan/cs188-lxc,ojkastl/lxc_Patches,DarknessBeforeDawn/lxc,Distrotech/lxc,terceiro/lxc,christiaan/lxc,hkjolhede/lxc,jirislaby/lxc,lisongmin/lxc,akshaykarle/lxc,caglar10ur/lxc,christiaan/lxc,fwilson42/lxc,ojkastl/lxc_Patches,hallyn/lxc,armcc/lxc,efiop/lxc,Pelagicore/lxc,thmo/lxc,bostjan/lxc,hfuCN/lxc,major/lxc,GreatFruitOmsk/lxc,rowhit/lxc,regit/lxc,aeris/lxc,virajs/lxc,codebauss/lxc,hallyn/lxc,ysbnim/lxc,hfuCN/lxc,sapun/lxc,QingweiPeterLan/cs188-lxc,JohnPeacockMessageSystems/lxc,codebauss/lxc,szaszg/lxc,LynxChaus/lxc,Distrotech/lxc,hkjolhede/lxc,Distrotech/lxc,szaszg/lxc