Improve callbackList code
Add events support
Remove parseMap in fetching logic
Add emitData function
Improve combo plugin using events mechanism
Use events to support no cache timestamp
Improve combo plugin using events mechanism
Add hooks to emit special events
Change map to fetch events
Change map to fetch events
Tweak test cases to fit recent modification
Add comments for emitData
Add nocache plugin
Simplify parseMap logic
Make documentation runnable with the latest sea.js