Add index to map documentation.
Add index to map documentation.

simplegeo/polymaps,cksachdev/mapsense.js,gimlids/mapsense.js,shkfnly/mapsense.js,Cherchercher/polymaps,Andrey-Pavlov/polymaps,dillan/mapsense.js,mbostock/polymaps,Laurian/mapsense.js,mapsense/mapsense.js,sfchronicle/mapsense.js,manueltimita/mapsense.js,RavishankarDuMCA10/mapsense.js,Andrey-Pavlov/polymaps,makinacorpus/polymaps,AndBicScadMedia/polymaps