improving esppy integration

[ethem-kinginthenorth]

One specific task is:
model.deploy can deploy the astore model but we need one API to load them
with open('c:/temp/Simple_CNN.astore', mode='rb') as file:
fileContent = file.read()
store_ = sw.blob(fileContent)
s.astore.upload(rstore='test',store = store_)
The above codes are repeated many times. I think we should have a new API to upload the astore model.