Overmod for Hacker News

Adds a personal ban list for sites like Hacker News that allow you to remove user comments from the page automatically so that you can spend less time and get more info. Highlight users in different colors so you can pick out the ones you trust. Changelog: 0.11.0: Cache lists in the background, not in-band 0.10.0: Remove O(n^2) highlight/blocking to improve performance on big threads 0.9.0: Fix some bugs regarding header line, allow regex match for local blocks 0.8.0: Remove "blocked" placeholder and fix counting 0.7.0: Also allow hiding comments from green users 0.6.1: Also block on user pages, just not for the user whose page it is 0.6.0: Allow transient lists, where people can be unhidden temporarily per-page 0.5.0: Added import/export; solve options bugs and highlight bugs 0.4.2: Highlighted users' comments shouldn't be 'dead'/'flagged' 0.4.1: Small code cleanup 0.4.0: Add different colours for different highlight lists