hardcodes 2012 stats based on cal fire stats kept here: http://cdfdata.fire.ca.gov/incidents/incidents_stats?year=2012
fixes bug I had on the template when displaying 2012 acreage stats
fixes bug I had on the template when displaying 2012 injuries. Hard codes to none in the view and displays n/a by default if None value
adds explainer and source links to year over year data comparison text
adjusts caveat order to match order of display
adjusts tagline to close #26. Can be fleshed out by the editor
Merge pull request #48 from SCPR/design_template

Cleans up and adds to year over year comparison section of the index page