* update state store key separator and extract pool key sep
* update state key separater and pool id seperator to not conflict with
'/' in ibc vouchers
* fix pool ids for updated sep
* add regression test for hooks; refactor deposit to commit pool and
shares in one place with commit after validation checks; panic on pool
and share set methods if the record is invalid
* use correct hook ordering; add regression test for order - fails if
hooks are not called before or after share record set
* add message types for swaps
* add tx client commands
* add test coverage for swap message deadlines
* start handler swap tests, export handler result message event into
private method, add stubbed keeper methods
* add initial swap implementation to get handler tests passing; adds event
specific for trades
* add handler acceptance test for slippage in exact input and exact output
swaps
* implement slippage limit for swap keeper methods
* add tests to ensure a user can only swap spendable coins
* test pool not found, panic on invalid pool, and panic when module
account does not have enough funds
* validate that the exact output when using for exact swaps is less than
the pool liquidity
* nit: long line
* add validation that swap output is greater than zero
* add rest txs for swap messages
* nit: lints
* dry up swap keeper methods
* from pr feedback - spelling and increase clairty around the output
amount of a swap rounding to zero
