disabled minifyify by default
stopped sending api key with YouTube Data  API requests
(it's redundant if i'm using auth tokens)
added refresh videos button; decreased size of subscriptions column
handle chrome.identity.getAuthToken() null response
only load subscriptions if subscriptions aren't already loaded
save current view between extension reloads/page refreshes
also, here's the other half of the loadSubscriptionVideos renaming. whoops.