Improve HtmlPlugin - Fix issue where updating src of tags didn't trigger the file output - Fix wrong output path for excluded paths - Add getManifestContent to handle manifest requires. As in other plugins (see commit log)

Add util getManifestContent to JsonPlugin This method is shared across plugins as a way to get the latest state of the manifest file and update stuff accordingly.

Add util getManifestContent to IconsPlugin This method is shared across plugins as a way to get the latest state of the manifest file and update stuff accordingly.

Add util getManifestContent to ResourcesPlugin This method is shared across plugins as a way to get the latest state of the manifest file and update stuff accordingly.

Add util getManifestContent to LocalesPlugin This method is shared across plugins as a way to get the latest state of the manifest file and update stuff accordingly.

Another big set of updates on RunChromePlugin - Add error message when the background file is not found. There was a bug when we couldn't find the background file but compiler hasn't started, and had the error handled by reload plugin. - Add master_preferences file. Adds a lot of defaults for Chrome to speed up the startup time.

Several changes in RunChromePlugin - Nice progress bar for new user profile creation - Added "stats" config - Plugin accepts different ports per config option - Supress native Welcome page from Chrome with our own* * = Supressing native Welcome page was needed due to WebSockets closing connection during first run of Chrome. While the extension do run, stopping the WebSockets connection breaks the reload strategy, and since we can't run away from the first run to generate the user profile, we replace the welcome page with our own and add instructions for users on how to run the dev mode properly.

Delete CopyPlugin code from ResourcesPlugin This is handled by the new SpecialFoldersPlugin