Release v0.1.0

First release including:

Clients and:

• Spot REST Clients
• Spot Websocket Client
• Futures REST Clients
• Futures Websocket Client

General:

• complete documentation at https://btschwertfeger.github.io/KrakenEx.jl/dev/
• access both public and private endpoints
• responsive error handling and custom exceptions
• extensive example scripts (see /examples)