Update Python client for Ethfinex Trustless to use 0x version 2

pyexchange

Python API wrappers for some cryptocurrency exchanges.

Run the following commands:

git submodule update --init --recursive
source _virtualenv/bin/activate
bash ./install.sh
export PYTHONPATH=$PYTHONPATH:$PWD:$PWD/lib/pymaker

These API wrappers expose only those endpoints which were necessary to implement market-maker-keeper (https://github.com/makerdao/market-maker-keeper), market-maker-stats (https://github.com/makerdao/market-maker-stats) and sync-trades. Due to it they cover most only order placement, order cancellation, reading balances and open orders, and retrieving past trade history.
This library depends on pymaker because IDEX integration involves interacting with its smart contract. In addition to that, other exchange APIs use the Wad class which is defined pymaker.
There is almost no test coverage as of today. The exception is some part of the IDEX API.
If you are looking for more supported exchanges and/or more features, a please have a look at ccxt (https://github.com/ccxt/ccxt). It's a JavaScript / Python / PHP library which supports huge number of venues and also has more features than pyexchange.

See COPYING file.

Run the following commands within a virtualenv

pip3 install -r requirements-dev.txt
./test.sh