Make Javascript files load faster
Slight changes in user links and register page
Add parent/children links on chapter pages
Counts page views for roots & chapters
Fix problems with the graph
1. Arrows will be displayed on leaf nodes in some browsers like Safari, QupZilla, etc.
2. Redraw the graph only when needed data (hit counts aren't) are changed
Add a 'return_to' argument in login page
Add a link to go back to the root details page on chapter pages
Add a simple tags system
Add tag pages