Fix checking of regex result
Just look at all p's in a page rather than try to maintain a list of selectors
Only inject on jut-io github repos
Revert "Just look at all p's in a page rather than try to maintain a list of selectors"

This reverts commit 921f3d711c573ac1ecdb1df948f7312c9a30017c.
remove options & background pages, change link color to match github's, split out config