added google analytics tracking code
cleaned up application helper
moved javascript to head again to avoid fouc
added state to advanced water navigation
added state to advanced sanitation navigation
created separate footer for reports
sanitised yaml files
split out report models so that non-user reports can be stored for sharing
implemented report sharing for water basic
implemented report sharing for the rest of the calculators
commented out about and contact links
fixed slider values with pre-populated minimum values not saving data when user clicks button
added links in empty reports to enter cost data
fixed distance default answer question
fix for logarithmic values being set when users enter numbers directly into inputs
amended basic chart as per ticket #99
add port forwarding to vagrant
implemented responsive nav
implemented responsive navigation
fixes for responsive website for basic calculators