Checkpoint: plan to create a mixin that can handle sorting Series or Programs.
/programs and /series both work. TODO: testing; browse program just by year.
Replace list of program titles with a grid of years.
Add a very simple test, which passes.
Route labels were changed, but I think this is more consistent.
Swap "Series" and "Programs". Add "Browse:" (not enough room for "WGBH")
Programs and Series are not as similar as I thought, so unfactor the earlier change. Click-thrus work.
Merge.
Remove TODO text and update filename to be accurate.
Fix styling of header when window is narrow.
.search-icon and .action-menu css un-copy-and-paste.
Add programs + series links to narrow header. Too much css fiddling.
Make paths singular again: (I got on the wrong track thinking of "series" as a plural.)
Merge pull request #543 from afred/series-program-535

Series program 535