Pull out TDU charges from every plan's calculation

[bwigianto]

Refactor

Pull out the hard coded TDU charges in each plan calculation function in houston.py

To accomplish this

• Pull out both the TDU base charge and the per kWh charge to global variables
• Bonus points for making it configurable

[monkeywithacupcake]

What about cancellation fees (like Infuse $100 if cancel before 3 month term) and other fees (like Infuse $5 per month if not on autopay)

[bwigianto]

Thanks for looking into it! That's a good point. I think for now, ignore early cancellation fees. If you have unusual circumstances like say you're moving to a new house, many companies will waive that fee. It's really only if you decide to go with a different company in the middle of your contract.
I'd also ignore the autopay fee for now.