Beautify donate area

Hope you don’t mind I tried to make this prettier! It seemed a shame to
have such clean interface and not have footer text to match!
Merge pull request #170 from dryanmedia/change-donate-tag

Beautify donate area
abstract #170 into less and recompile
fix bugs found by scrutinizer
new function + filter to change map tile provider

ref #172 props @dryanmedia
block the sneak tracking fotorama tried to creep in on us
cleanup unused code
fix self hosted videos not being 100% width
introduce aesop_quote_size_unit filter

allows the size unit to be overriden with a filter, still defaults to em
Merge branch 'release/1.3' into dev