Fixed #343. Fixed #2565. localStorage cache now only lasting a week for most items, using lscache (bower install, y'all).

app/core/storage.coffee

@@ -1,4 +1,6 @@
-module.exports.load = (key) ->
+# Pass false for fromCache to fetch keys that have been stored outside of lscache.
+module.exports.load = (key, fromCache=true) ->
+  return lscache.get key if fromCache
   s = localStorage.getItem(key)
   return null unless s
   try
@@ -8,8 +10,17 @@ module.exports.load = (key) ->
     console.warn('error loading from storage', key)
     return null
 
-module.exports.save = (key, value) ->
-  s = JSON.stringify(value)
-  localStorage.setItem(key, s)
+# Pass 0 for expirationInMinutes to persist it as long as possible outside of lscache expiration.
+module.exports.save = (key, value, expirationInMinutes) ->
+  expirationInMinutes ?= 7 * 24 * 60
+  if expirationInMinutes
+    lscache.set key, value, expirationInMinutes
+  else
+    localStorage.setItem key, JSON.stringify(value)
 
-module.exports.remove = (key) -> localStorage.removeItem key
+# Pass false for fromCache to remove keys that have been stored outside of lscache.
+module.exports.remove = (key, fromCache=true) ->
+  if fromCache
+    lscache.remove key
+  else
+    localStorage.removeItem key

bower.json

@@ -47,7 +47,8 @@
     "modernizr": "~2.8.3",
     "backfire": "~0.3.0",
     "fastclick": "~1.0.3",
-    "three.js": "*"
+    "three.js": "*",
+    "lscache": "~1.0.5"
   },
   "overrides": {
     "backbone": {