Create first time setup / install script and readme update

[Amatobahn]

It is not been uncommon to have a lot of confusion to set up the environment properly to get bqt to run properly. (noting the requirements for https://aka.ms/vs/16/release/vc_redist.x64.exe among the required python packages)

[bob-white]

Yeah, the process is kind of obscure and insane, and behaves very differently depending on how you install things.

Really do need to write something up for the whole thing.

[TravisEvashkevich]

I had started a bat/py file to do setup and such, but I don't know if it was totally finished and the redist mentioned above wasn't in my list of reqs.
Just checked and it was mostly a "reqs" install and copy py3.dll to the folder (as per talks with you guys before)

[Amatobahn]

Yeah that actually may be just fine. I think the redist was something we had figured out from a completely fresh OS install that may have not received the redist from some other means. I think that as long as we can verify it working we should push it to the repository.

[Amatobahn]

Partial progress has been made with the official PyPi package that will auto-install all the dependencies we need for blender to work with bqt out of the box.. We currently now just need to update the Readme to reflect the changes

[hannesdelbeke]

aynone knows if this is still needed? don't think this is needed anymore

copy py3.dll to the folder

thinking of doing some changes to the setup, will discuss in slack.

[hannesdelbeke]

closing this after slack discussion and update to support loading bqt as add-on #61