Updated ArduinoJson dependency and minor networking changes

• Project now dependes on ArduinoJson version 6.xx instead of the old 5.xx
• Added yield() as default behviour inside CloudStorage::loop in case the user will not call delay or yield himself.

Patch - ESP32 bug

Hotifxed issue in esp32's impl. Usage of websockets after HTTPClient caused problems.

Real Time Updates

Added real time updates (support for WS interface)
ArduinoWebsockets is now a dependency

Aggregations, Atomics and Examples

Fixed release

Aggregations, Atomics and Examples

0.4

Merge branch 'master' of https://github.com/gilmaimon/Arduino-CloudSt…

0.3

Updated properties to version 0.3

"Pop" feature and error indication

Pop feature is now implemented client side.
Also the api handles now return constructs to indicate errors and more information.

0.1

Update README.md