usernameHider: Slightly adjust displayText description
usernameHider: Show true username on mouseover

Fixes #1139.
usernameHider: Update description
usernameHider: Add option to disable show on hover functionality
usernameHider: Disable showUsernameOnHover by default

Per discussion on #1698.
usernameHider: Only replace username portion

Per @andytuba's comments on #1698.
Update changelog.txt to version 4.1
Update changelog.txt to v4.2
Update changelog.txt to be up to date
Improve some option descriptions
fix description of subredditStyleBrowserToolbarButton
Added option to embolden edited times
Remove tabs from blank line
Enable unsafe-content-script for Firefox

This makes RES work on Firefox 36 (nightly). This will likely break completely in the future, as Mozilla is making security-related changes to UnsafeWindow[1]. For now, however, it makes RES work on the latest Firefox nightlies without issues.

[1]: https://blog.mozilla.org/addons/2014/04/10/changes-to-unsafewindow-for-the-add-on-sdk/
Fix handling of imgur 'hash list' albums
Add comment tools to modqueue-like pages
Slightly different regex
Integrate fix into main match regex
subreddit macroPlaceholder returns subreddit of current thing, or current subreddit if not explicit
reply_to macroPlaceholder returns subreddit of current thing, or current subreddit if not explicit