add version to login json
Merge branch 'development'

Conflicts:
	app/controllers/sessions_controller.rb
allow users to disable gravatar.
Merge pull request #228 from Snorby/development

allow users to disable gravatar.
use onerror due to gravatar api change
fix password reset form by not using shared ID
Update sensor controller index render formats
Create sensor index js
Create _sensors.html.erb
updates for rails graph / vulnerability fixes.