Minor comment change
Removed deprecated property from export

Forgot to stop exporting the array of blacklist selectors after moving
the array to a separate file
Minor style change to showOrSkipSubscriptionPreview

Just declare the inner helper function onFetchSuccess normally, no need
for alternate syntax.
Minor cleanup

Remove some comments, some old code, some new lines
Minor cleanup

Cleanup some whitespace and comments
Minor comment changes
Use native xml parsing

Use overrideMimeType('application/xml') to force native parser to throw
errors for non-xml urls instead of trying to manage it explicitly. This
simplifies the code. This commit also cleans up some comments.