string replacement issue fix (massive-com#197)

add module __version__ (massive-com#190)

Options contracts (massive-com#183)

bump example date

cryptotrade: rename sym to pair (massive-com#168)

add certifi for wss (massive-com#156)

* add certifi for wss

* lint

add certifi (massive-com#155)

fix release

Add Models to Docs (massive-com#146)

fix releasing (4)