DDAList component

[themandalore]

Add a component for the ddaList functionality (just us)

[themandalore]

This is the new component.
The blue words just open up the how_to page for now.
The buttons open up a modal that looks like the create contract modal.

So they will have to choose a duration, an asset, a start date and then enter an amount to buy.
When submitted, they will run the exchange function:
buyPerUnit(address _asset, uint256 _amount)
(asset being the token address of the token).

The difficult part of this is populating the drop downs correctly.
****NOTE, we're adding getters. So wait for that before you start this
So you will run these functions:
exchange.getLongTokens()
exchange.getShortTokens()
to get an array of addresses and amounts. If the amount is > 0, then allow it to populate the dropdown.
Next to the 'Amount' field, also put the max amount that they can buy.