🐎 Cache compiled CSON files

This configures season to use a cache directory similar to the
coffee cache so that dev windows don't have to recompile CSON file
on each load.

This shaves hundreds of milliseconds off of the dev window load time.

The cached CSON files are located in /tmp/atom-compile-cache/cson

package.json

@@ -31,7 +31,7 @@
     "pegjs": "0.7.0",
     "plist": "git://github.com/nathansobo/node-plist.git",
     "rimraf": "2.1.4",
-    "season": "0.12.0",
+    "season": "0.13.0",
     "semver": "1.1.4",
     "space-pen": "1.2.0",
     "tantamount": "0.3.0",

src/coffee-cache.coffee

@@ -3,13 +3,16 @@ fs = require 'fs'
 path = require 'path'
 
 CoffeeScript = require 'coffee-script'
+CSON = require 'season'
 mkdir = require('mkdirp').sync
 
-cacheDir = '/tmp/atom-compile-cache/coffee'
+cacheDir = '/tmp/atom-compile-cache'
+coffeeCacheDir = path.join(cacheDir, 'coffee')
+CSON.setCacheDir(path.join(cacheDir, 'cson'))
 
 getCachePath = (coffee) ->
   digest = crypto.createHash('sha1').update(coffee, 'utf8').digest('hex')
-  path.join(cacheDir, "#{digest}.coffee")
+  path.join(coffeeCacheDir, "#{digest}.coffee")
 
 getCachedJavaScript = (cachePath) ->
   try