CSS tweaks

[yochannah]

okay - I think the CSS tweakage will be an ongoing work for now. This PR addresses:

• Avoid all capital section formatting? #19 - all caps headers
• homepage content - too wide for single column text pages #18 - there is a max width for BOSC page styles. This behaviour may need to be added in other places too.

Plenty more needs to be done but I think this is a respectable chunk. The changes are relatively low-risk and should be safe to deploy to prod I think (famous last words, I know) - they're largely font sizes, with some padding and margins, and one html class change. HUGE thanks to @peterjc and @heuermh for the visual feedback to get here.

Example collaborationfest page, before:

after:

[yochannah]

This also fixes #16

[heuermh]

Looks pretty good to me!

On the CoFest page I last tried bumping the headings up to H1/H2 from what they had been before (H3/H4 probably), so with this new CSS they could go back down if they are too big relative to the paragraph text size.

[nlharris]

That looks much better--thank you!! We'll need to check all the pages after you make the change, because some layout stuff, picture sizes, etc. may need adjusting.

[peterjc]

I agree, based on the screenshots this is a worthy improvement. The risk assessment seems fine too - let’s merge it?

[peterjc]

The current README.md description is not clear to me, but I gather some (manual?) deployment step is required after the git merge?

[peterjc]

Documenting deployment logged as #23.