New docs section: Extended intallation information

[darcyabjones]

Despite my efforts to make the conda, docker based setup as easy as possible, we still had some issues.

I suggest that on the main repo README we have a quick-install version, and in the wiki we have an extended INSTALL document.

We should add common mistakes and FAQs as encounter them. We've already encountered:

• using sudo when installing miniconda
• using WSL1 (possibly WSL2 won't work either, we'll see)
• Distributions not supporting i386 instructions (afaik this is only an issue for signalp3, possibly we can drop this as a dependency if it's not still better for some organisms). Suggest installing libc-i386.
• not running the -register scripts (better documentation should help avoid this).

[darcyabjones]

I'm not sure that the simplified install instructions in the readme are especially simple. But i think they're much more legible than the previous ones.

Unsure how I could shorten it without losing something important.

[darcyabjones]

We now have some extended documentatin. The only thing missing is a short section for masochists that want to install things themselves. Main thing is that they need to label versions for effectorP1,2 and versions of signalp. Deeploc also had a few tricks.