Add a page about RocketCE conda channel

[parnumeric]

There's a page describing Open-CE conda channel which provides some popular software packages such as TensorFlow and PyTorch and some specialised libraries to use with them (for example, torchvision). However, Open-CE doesn't provide some other popular libraries, for instance, torchaudio for PyTorch. I recently found torchaudio via RocketCE conda channel, which can eliminate necessity to build it from source. The instructions are provided here: https://community.rocketsoftware.com/discussion/releasing-rocketce-torchaudio-v0130-with-opence-v180

We could add a page dedicated to using RocketCE conda channel similar to Open-CE.

[parnumeric]

A related #165 issue describing how to build torchaudio from source (which is also a working solution).

[ptheywood]

This forum post is the most "about RocketCE" type page I can find, although it's very old so the limitations will be out of date (I.e. not just python 8 or CPU only anymore)

The Releases Forum post will be worth includeing.

It is based on OpenCE, so probably worht addingn to the OpenCE page.

Then #165 can be solved by adding torchaudio instructions to it's own page, or onto the torch page. I don't think I have a preference.