First upload of the qtrl modules

Main module control.ctrlpulseoptim provides functions for optimising control
pulses for quantum systems. Relies on the other classes for processing.

Uses the BFGS (actually primarily the L-BFGS-B) algorthim, which is a quasi-second order Newton method for multivar function optimisation

Examples in the 'examples' folder to demonstrate usage.
1. Hadamard - a simple example of Hadamard gate synthesis
2. Lindbladian (open systems) - amplitude damping channel example
3. Symplectic - a coupled oscillator example
4. QFT - a 2 qubit example, showing alternative (more configurable) method for invoking the optimisation
We usually want all qutip to be "quiet" by default, so it can be included in loops and other functions without cluttering up the output. Therefore it would be better if you for example added a optional keyword argument to the function, something like `verbose=False`, and only print information to the stdout if the `verbose` flag is explicitly set to `True`