Quantum Gate Decomposition for QuTip

A known quantum gate can be decomposed into an already declared sequence of universal quantum gates in QuTip. If the desired decomposition is different from this predefined sequence then the functions proposed for this project could be used as an instance of n_qubit_decomposition class. Any arbitrary quantum gate can be decomposed into a product of universal gates via different methods. The proposed methods differ due to the type of gates chosen to form the universal gate set.