PW extension release

Back in mid December, when me and Brandon were closing in on our final submission of Plugin Watcher (0.31), we had to go against Mark Finkle's advice and hack our JS code directly into 'browser.js'. Mark had told us how inelegant this solution was, and this is the reason that my 0.6 release is the Plugin Watcher Extension. This extension listens to the runtime notifications of your plugins and notifies you if they exceed a certain limit a certain number of times per certain amount of time. At the moment the extension does not add any new functionality, but I'm working on including various configuration options in the future. To try the extension out click here to get to the project wiki.