Specifying rotation angles

[AckslD]

Currently we specify the rotation angle for single-qubit rotations with a one-byte integer n such the angle of rotation is n * pi / 180 radians.

However to have better granularity we could have it so that the angle is instead pi / 2^(n-1). In this case if one would for example want to do a rotation of 3 * pi / 4 one would first do a rotation with n=2 followed by one with n=3.