refine database postgis config per activerecord-postgis-adapter docs
`be rails generate scaffold WaterFountain point:point`
keep the json views
format point as geojson
rename water_fountain point -> location
update example database config
use 'pry' gem
skip csrf for water_fountain controller, TODO: implement REST auth
water_fountain strong parameters, allow GeoJSON location attr
remove html response cruft
format rspec water_fountain valid attrs as GeoJSON
WIP water_fountain tests -- create
Test suite passing! Various changes

remove edit/new actions in water_fountain controller
new geospatial aware setter for #location in WaterFountain
explicitly use json format in controller specs
remove stubbing in rspecs,
render errors in controller, don't redirect
new model specs, testing the #location getter and setter
Merge branch 'feature/water_fountains'