Documentation cleanup

[ceriottm]

New PR to address the documentation issues that were left open by a prematurely merged PR.
@rosecers could you please use this to Fix #295 ? perhaps a UWMadison student could do this?

Also Fixes #295 broken link in the load/save form

Also Fixes #259 - at least it should

[rosecers]

Hi @ceriottm! In general it looks good, although I'll note that the standalone link gives me this:

@saswatnayak1998 is also going to give a look this morning, then should be almost ready

[ceriottm]

Hi @ceriottm! In general it looks good, although I'll note that the standalone link gives me this:

@saswatnayak1998 is also going to give a look this morning, then should be almost ready

ok this is due to the browser ignoring the download attribute when opening a link from a different source.
It works when the documentation is deployed on chemiscope.org and not locally. I'll merge now, feel free to open another PR if you want to further polish the docs