Convert aboslute paths to relative

Conflicts:
	webapp/content/js/composer_widgets.js
	webapp/graphite/dashboard/urls.py
	webapp/graphite/metrics/urls.py
	webapp/graphite/templates/dashboard.html
Reuse slash path concept from graphlot in dashboard

Conflicts:
	webapp/graphite/dashboard/views.py
Activate url quoted syntax behavior for Django < 1.5
Merge branch 'master' of github.com:titilambert/graphite-web

Conflicts:
	webapp/content/js/dashboard.js
	webapp/graphite/dashboard/urls.py
	webapp/graphite/metrics/urls.py
	webapp/graphite/templates/browser.html
	webapp/graphite/templates/events.html