* token-swap: Add token supply in invariant calculation
* Refactor state classes into curve components for future use
* Align pool initialization with Uniswap using geometric mean of token
amounts
* Fix deposit and withdraw instruction to work as a proportion of pool
tokens
* Add math utilities to calculate the geometric mean with u64
* Improve variable names
* Use a fixed starting pool size
* Run cargo fmt
* Update js tests with new pool numbers
* Run linting
* Remove math
* Fix BN type issues found by flow
Michael Vines
Jon Cinque