- Added test of key for plist in a function where it wasn't present
- Added possibility of get path to cached file. Very useful por previewcontroller and some other classes which need an url and not an NSData.

- Added JSON Methods. It allows EGOCache to store JSONs easily

… as a temporal disk space for previewControllers for example. Perfect to use with methods to obtain path for cache object.

- Added json methods

…der definition to simulate

…InfoQueue);

…riable