[DOC] Cache

docs/EN/data/cache.md

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+Lungo - *Cross-Device Framework*
+================================
+
+## 3.2.1 Cache
+Lungo implements its own cache type. This cache will store the value until the wepapp is closed
+
+
+### 3.2.1.1 set()
+Sets in the LungoJS cache system a new key/value pair. 
+
+**PARAMETERS**
+
+```
+string:		Key for the new value.
+string:		[OPTIONAL] Subkey in LungoJS Cache System.
+object:		Value asigned to the key.
+```
+
+**EXAMPLE**
+
+```
+var framework = {name: "Lungo", twitter: "lungojs"};
+Lungo.Data.Cache.set("lungoFramework", framework);
+```
+
+
+### 3.2.1.2 get()
+Returns the cached value of a given key. 
+
+**PARAMETERS**
+
+```
+strin:		Key in LungoJS Cache System.
+string:		[OPTIONAL] Subkey in LungoJS Cache System.
+```
+This method **return** an object containing the value.
+
+**EXAMPLE**
+
+```
+var cachedFramework = Lungo.Data.Cache.get("lungoFramework");
+//Result: {name: "Lungo", twitter: "lungojs"}
+```
+
+
+### 3.2.1.3 remove()
+Removes the instance of a given key in LungoJs Cache System. 
+
+**PARAMETERS**
+
+```
+string:		Key in LungoJS Cache System.
+string:		[OPTIONAL] Subkey in LungoJS Cache System.
+```
+
+**EXAMPLE**
+
+```
+Lungo.Data.Cache.remove("lungoFramework");
+```
+
+
+### 3.2.1.4 exists()
+Checks if the given key is stored in the cache.
+
+**PARAMETERS**
+
+```
+string Key in LungoJS Cache System.
+```
+This method **return** a boolean value which is true if the key is found
+
+**EXAMPLE**
+
+```
+Lungo.Data.Cache.exists("lungoFramework");
+```