QuNetSim updates and other various improvements

[stephendiadamo]

…fied the templater to remove the backend choice.

Added the kwargs argument for host.run_protocol

Adding the bit_flip and phase_flip channel models

Removed the commented libraries from requirements.txt

Modified the template generation file

Adding the channel model parameter

Modified the test case for channel models and renamed channel_model file

Added the function to send n-qubits and it's unit-test

Added the method to initialize a qubit given angles theta and phi, tested only for the EQSN backend

Added the classical storage in host

Adding the channel_models documentation

Made a new function for changing the host ID for the EPR qubit

Changed the parameters for fibre channel in channel_models

Changed the alignment

Changed the alignment

Made minor changes to the examples in the docs