Fix command bar positioning bug
Create and use a custom dialog theme, and use safer option defaults in dialog.js
Update boilerplate comments
Add short note to boilerplate README
Add a boillerplate file without any examples or explanatory comments
Add the Command Manager extension to handle global application commands
Add the Shell API extension to allow interfacing with the application shell
Tidy docs, remove redundant load call, and load the Command Manager and Shell API extensions