Refactor calculation methods
Rename Result.generate to Result.fetch
Refactor view helper to actually be a view helper
Refactored ProjectLayer#get_raster and #get_provider to be class methods
Added basic blue carbon layer
Add get_providers to BlueCarbonLayer
Close to working requests
Add support for converting AOI polygons to multipolygon geoJSON
Cartodb query actually works
Added host to database config for Postgres.app compatibility
Merge branch 'experimental-blue-carbon-support' of git://github.com/unepwcmc/magpie into experimental-blue-carbon-support

* 'experimental-blue-carbon-support' of git://github.com/unepwcmc/magpie:
  Cartodb query actually works
Changed rvmrc to ruby-version due to changes in RVM
Removed testing file
Updated the blue carbon layer to also calculate area and human
emissions. This is a temporary fix to allow blue carbon to continue
functioning, until this is refactored properly.
Moved SQL from blue carbon layer in to lib/ file
Major refactor of the Area of Interest statistics generation to make it
considerably easier to understand (work in progress)
Project layers no longer require a provider
Merged Float::value and String::value_json into a single String::value
Added operations for total area and carbon; updated existing operations
to work with change in DB structure (value_json -> value)
Save JSON differently