Implement higher-qubit-count state preparation techniques

[ecpeterson]

https://arxiv.org/abs/1003.5760 contains efficient state preparation schemes for other small numbers of qubits beyond 1 and 2. Implement them!

[ecpeterson]

Some other papers of interest: https://arxiv.org/abs//1003.5760 , https://arxiv.org/pdf/quant-ph/0001116.pdf .

[junkicide]

interested in this one.

[ecpeterson]

also this one https://arxiv.org/pdf/0711.4021.pdf