Add Customers Management Tool

[AmenZhou]

Create a new page, see the details below

1 grab buttons -- call the existing grab method in the model

2 all the data should be restored to the database

3 show the results as a table on the page

4 till now we can grab data from three websites

5 prevent grab repeated data which is already in the database

6 try to solve response timeout problem int the futhure

[AmenZhou]

Finished