Prepare for the next release

CHANGES_NEXT_RELEASE

@@ -1,6 +0,0 @@
-- ADD Documentation about the release process.
-- FIX Crash when an update arrives and commands attribute is not defined.
-- ADD `exit` commands.
-- FIX missing headers in group operations.
-- ADD command to show and change IoTAgent console configuration.
-- FIX missing device in 'store()' function of the Memory Registry.

package.json

@@ -1,7 +1,7 @@
 {
   "name": "iotagent-node-lib",
   "description": "IoT Agent library to interface with NGSI Context Broker",
-  "version": "0.5.0",
+  "version": "0.5.0-next",
   "homepage": "https://github.com/telefonicaid/iotagent-node-lib",
   "keywords": [
     "fiware",