initial stab at couchdb caching.
initial stab at couchdb caching.

not done, not tested
 modified:   lib/caching_service.js

A couchdb caching module is good because you can do more than just
fetch by year,month,day, you can do a map reduce on year, month, day and get
sums of same.

Sum all the years, sum all days, etc.

And anyway, I am caching geojson, not the data.  The data is actually fast to get.

jmarca/caching_service