Add option to merge driver sessions
Improve display of delta values for fuel and position
Add fuel chart to races and sessions
Add stats collation and display to the race view
Fix charts for sessions without fuel data
Fix session lap logic when a race involved
Add driver aliases
Add class to make form help text smaller
Add interface to retrieve sessionless races (for the app)
Add an auth token to the user and limit driver lists/session creation using it
Fix bug in token regeneration
Update README.md
Merge branch 'master' of github.com:lordp/virtualwdc

Conflicts:
	db/schema.rb
Fix bug in session assignment
Add favicon
Update repo url
Add user show link
Add auth token to user edit
Fix bug in session charts
Add gaps chart to session view