<footer> V3 !!

- reinstated <ul>: both pieces of info ARE semantically related as
copyright/credits
- both contained within <small> to indicate "contractual" nature
- .author replaced by .visuallyhidden: now both coverted by copyright,
no need to privilege this over site owner with semantic class
14px mid-point

For mobile layout testing as bg-img
Update end comments to reflect id name changes
Separate .nav-back from #content

New <div> below main #content: this is not actually content, it relates
to page navigation
Change .nav-back to #

Only ever going to be one, possible hook for .js
Added .date headers to #work-list

Nested lists: clear sequential relationship between date sections
Header heirarchy revisited (!)

Restored page-wide heirarchy: h1 - h6 now cuts across <div> boundaries,
instead of starting at h1 with every new div
Move Work header out of #work-list

This is the page header, not the work-list header
ul replaces div as #work-list

No need for containing div; h2 moved into  main content container so:
- ul can become work-list container
- adds some semantic meaning to container?
Header heirarchy revisited pt.2

Work pages: bringing Waork & Exhibition titles into line w/ page-wide
heirarchy
Footer revisited (!)

Changed .copyright to #credits
- more inclusive name
- allows for distiguishing btwn copyright owner & web-dev
CSS: reduce inheritance bleed

Element-unique styles restricted to element-specific tags