Add a link back to the main CATMAID page
Add a link back to the main CATMAID page

Closes #187

fzadow/CATMAID,htem/CATMAID,htem/CATMAID,fzadow/CATMAID,htem/CATMAID,fzadow/CATMAID,htem/CATMAID,fzadow/CATMAID