Quforge

This version fixes a problem in the measurement function, now it needs the number of qudits as the argument.
Before:

bash
histogram, p = qf.measure(state=yourstate, dim=dim)


After:

bash
histogram, p = qf.measure(state=yourstate, dim=dim, wires=wires)


Additionally, we fixed a typo in the docs.

Before:

bash
import quforge as qf

Now it reads:

bash
import quforge.quforge as qf

We moved the library to PyPi package, you can now install it with pip!

bash
pip install quforge


Other changes:

- Changed license to Apache 2

- Added some non-linear PyTorch functions. For instance, you can call the hyperbolic tangent as:

bash
import quforge.quforge as qf

tanh = qf.Tanh()
y = tanh(x)


- A few updates on the documentation [quforge.readthedocs.io](https://quforge.readthedocs.io)