Display the checkout form at the front-end

[nimid]

1. Objective reason

Display the checkout form at the front-end.

Required pull request: #1, #3, #5 and #6

2. Description of change

• Implement a function, Omise->hookPayment(), to check module status. If the module status is valid the checkout form will be display.
• Create a checkout form template file.

The screenshot below shows the checkout form at the front-end.

3. Users affected by the change

All

4. Impact of the change

-

5. Priority of change

Normal

6. Alternate solution

-

[nimid]

Re-implement this feature by continue from the pull request #10.