updated RTD setup

uncap numba, remove annoy, update paper

fix batch scrambling, rng seed, embedding skip in tutorial

remove superfluous imports

typo

alter markdown formatting

readme blurb about functions

examples in relevant arguments

expand matrix function docstring

okay it's not the mocks

try old mock again in case it helps

mockup sklearn

reintroduce mock imports

matrix function doc support attempt

embedding in docstring