Add asynchronous functions

[SimsumMC]

It would be great to have added the option to run things asynchronous with another method, for example, get() for synchronous and get_wait() for asynchronous programming. In the asynchronous functions, the only thing that needs to be changed is to replace requests with an asynchronous HTTP library like aiohttp.

I would love to see that because I don't have the time and I love this library but it's blocking my event loop. Keep up the great work!

[radomirbosak]

Thank you for opening this issue @SimsumMC . This looks like a very useful feature.

I suspect that a simple substitution of the request function might not be enough, since caching is performed too. I wonder how async requests do caching.
I'd like to look into this when I have a bit more time.