add caching, skip varying on most GET API endpoints (bug 946845)
Merge pull request #341 from ngokevin/iarcspanish

show esrb spanish icons for spanish lang (bug 950239)
use region to ratings body label map to get content rating (bug 948192)
update locales in yulelog
add new region (bug 952581)
update region flag icons
condense region flag styles
Merge pull request #345 from ngokevin/iarcoptimus

use region to ratings body label map to get content rating (bug 948192)
fix show spanish icons for esrb in non-english countries (bug 950239)