Debugging patch for v0.11.0

Primarily, in this release, matrix expectation value variants have been debugged to accept the correct number of arguments: they should take 2 Float components for each component of a 2x2 matrix, for 8 Float components in total. Documentation has also been updated.

sha1sum result:
9175831dee7c6c11ba6bd3f20fc01a307021f42b qook-0.11.1.crate