Try…catch when parsing JSON.

Readme corrections.

README.md

@@ -89,9 +89,9 @@ klout.getUserInfluence(klout_id_or_user_id_hash, function(error, klout_response)
 # Cache support
 
 Klout suggests to store indefinitely Klout IDs obtained after requesting Klout identities.
-With such cache or storage all calls basically cost 2 API calls because one is used to convert a Twitter/Facebook/Google+ user to a Klout user.
+Without such cache or storage all calls basically cost 2 API calls because one is used to convert a Twitter/Facebook/Google+ user to a Klout user.
 
-Optional parameters can be passed to `coffee_klout` so it internally stores Klout identities.
+Optional parameters can be passed to coffee_klout so it internally stores Klout identities.
 It can also optionally cache other API reponses.
 
 coffee_klout currently supports only Redis clients:

src/index.coffee

@@ -31,7 +31,10 @@ class Klout
     return callback "No cache set" unless @cache
     @cache.get key, (error, result)->
       return callback error or 'No cached value' if error or not result
-      callback null, JSON.parse(result)
+      try
+        callback null, JSON.parse(result)
+      catch ex
+        callback ex
 
   # Set an object in cache, if a cache is configured
   _setInCache: (key, value, ttl, callback)->