Adds reset navigation method
Merge branch 'develop' of github.com:CartoDB/cartodb20 into develop

* 'develop' of github.com:CartoDB/cartodb20:
  Varnish headers for google analytics tracker
  analytics for embed.js
  fixed embed_map.js in IE (working in IE7,8,9,10)
Fixes bug with the map search box not moving when the pane was opened