Evolved5g

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* Improvements on LocationSubscriber.
A new method has been implemented with name
``get_location_information``

With the new method the net app developer has the option to request for location information for a device just once. No need to create subscriptions or maintain a local web server in order to get notified for location changes.
When a call to ``get_location_information`` is made, the 5G-API responds instantly with the location information (the cell id the device, that is being monitored, is connected to)

* Examples of usages have been updated
File location_subscriber_examples.py now showcases how the new method can be called

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* Added Pypi functionality to automate generate a new SDK pip package

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* Added QoSAwareness to SDK. A class that allows to establish and monitor Non-GBR and GBR QoS targets
* Support for the latest version of NEF (v1.2.0)
* LocationSubscriber now only requires an external_id as user equipment identifier. IP_4 and IP_V6 have been removed from method create_subscription()

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* Added class LocationSubscriber to SDK. A class that allows to get location monitoring reports from the 5G-API
* Clean-up the code
* New cli_helper.py class created to improve the code
* cli.py class updated for better practices
* Added new command options to interact with the pipelines

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* Added version option to CLI
* Changed 'generate' command to point to EVOLVED-5G/template at Github
* Added template option to point to your user's template. Used in tests by default pointing at skolome/netapp-ckcutter-template

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* Added documentation to "generate" command
* Added documentation to readthedocs