reformatted editor.js
special keys support for sendKeys in Selenium IDE, including webdriver playback. Fixes issue #6052
Improved Selenium IDE plugin API documentation and added type for formatters
Adding special keys support to sendKeys in all official formatters for Selenium IDE + enhancement of plugin api for formatters with an additional type parameter. Fixes issue #6053
Bumping Selenium IDE version to 2.3.0 and adding Firefox 23