Feat: Add crudWs

[pcriadoperez]

• Refactor client into client.py, asyncClient.py, baseClient.py
• Moves all ws files to a ws folder
• Adds crudWs functions to sync and async client for both ws_api and futures ws api
• Some ws fixes
• add tests

[coveralls]

coverage: 61.33% (+3.2%) from 58.143%
when pulling 73afa84 on pcriadoperez:crudWsv2
into 23e17d6 on sammchardy:master.

[carlosmiei]

• fixes Wish to add a gift card redemption interface #1472