vistrails/gui/theme.py:  - Change the width of default LINK_PEN from 2.0 to 1.5
vistrails/gui/theme.py:
 - Change the width of default LINK_PEN from 2.0 to 1.5


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