Create ERC20 Wrapper Factory and Wrappers for ParaAugurs

[Justin]

In order to have a consistent set of cost effective ERC20s for use in various pools we are going to add the machinery all ParaDeploys to be able to consistently create share tokens.

1. Create WrappedShareToken that is simple ERC20
   a. [x] wrap
   b. [x] unwrap
   c. [x] claim proceeds
2. Create WrappedShareTokenFactory for creating ERC20s associated with a particular ParaDeploy
   a. create WrappedShareTokens (for a tokenID/symbol pair)
   b. wrap / unwrap / etc
   c. helper functions for: publicBuyCompleteSet, publicSellCompleteSet that works on all the ERC20s?
   c. Is trusted by WrappedSharedToken
3. Integrate with AMM Factory
4. Update all the tests

[Eric Chuven]

closing