 <ticket>#420</ticket> <bugfix>debug imports cause ubuntu package install to fail</bugfix>
 <ticket>#420</ticket>
<bugfix>debug imports cause ubuntu package install to fail</bugfix>

core/bundles/linux_ubuntu_install.py:
from core import debug: *removed
- GUIInstallProgress.conffile: convert debug call to print statement
- GUIInstallProgress.error: convert debug call to print statement

VisTrails/VisTrails,celiafish/VisTrails,Nikea/VisTrails,minesense/VisTrails,Nikea/VisTrails,hjanime/VisTrails,hjanime/VisTrails,minesense/VisTrails,Nikea/VisTrails,minesense/VisTrails,hjanime/VisTrails,hjanime/VisTrails,VisTrails/VisTrails,minesense/VisTrails,celiafish/VisTrails,celiafish/VisTrails,VisTrails/VisTrails,hjanime/VisTrails,VisTrails/VisTrails,celiafish/VisTrails,Nikea/VisTrails,VisTrails/VisTrails,minesense/VisTrails