Table and Figure caption styles

[gesa]

Updated to Ecma house style.

• Update css to align with template
• Replace : with —
• Begin re-numbering figures at the beginning of each annex (as A1, A2, etc)

[gesa]

I don't like it, but okay.

@michaelficarra I would be delighted to come at the numbering with a different approach. I also don't like it, at least not the solution I'm proposing. I just couldn't think of anything better.

I found a mismatch in the layout as compared to the template reviewing this—figure captions should render below the figure, table captions should render above the table. Commit resolving this incoming.