initial version

just copy from the video demo
copy initial version to separate file

The code is remain the server, and this version is still use the demo
server
user listen
Can get the data from localhost

Create/Update can't work for now
first version of Event

1. use local storage
2. just a basic action like create/delete/edit
3. a issue: click a delete, there're event properties appended on the
URL, I can't find the reason
add a join button

not work now, just back up
fix issues with the help of Junhua

1. fix the delete issue.
2. fix can't add new member issus
The remaining issue:
1. Still can't save the members to the event
build a join view for each of event

1. Can't update after join
update some

1. the join still can't work
fix the join issue

The reason is the participators is an Object, the listen is only work
for the reference change.
refactor the Event list view

add event item view in event list view.
Just for the expandability
update the framework
almost fix all the framework issue

It can refresh the join page and the edit page
init backend frame work
Add backend support for event
增加 App.session
fix mongodb connection
update