Cede control of SEED rebate to UP holders

In the second generation of utrade contracts it is important to make the SEED trade rebate as flexible as possible. This allows the team to get creative using the rebate, which is unique to utrade, in ways that might not be thought of immediately. Furthermore, controlling the parameters of the rebate should be managed on a chain by chain basis and voted on by the UP holders on that chain.

Specifically, I would like to see UP holder control over:

1.The percentage of the trade fee that is used for the SEED rebate (within certain parameters).
2.Whether the rebate is actually a buy and burn of SEED or a buy and rebate to the trader.

Additionally, we should add the ability to rebate different tokens other than SEED and to also potentially rebate more than one token, with a mechanic to pull secondary tokens from set pools of tokens at a predefined rate. This would encourage trading volume for projects and could be seen as a unique feature to utrade.