* introduce --debug option to abi-gen and remove debug functions from @0x/abi-gen-wrappers
* make evmExecAsync protected; ignore deployedBytecode in doc comment
* trim deployedBytecode so it's undefined unless a contract has pure functions
* remove validateAndSendTransactionAsync
* Create `AwaitTransactionSuccessOpts` and `SendTransactionOpts` types
* Remove duplicate types `IndexedFilterValues`, `DecodedLogEvent`, `EventCallback` from `@0x/base-contract`