Code re-structure

[edro15]

Use classes to create interfaces to Splunk Cloud and S3 instead of a list of functions (utils.py). Each class should define an object defining APIs, wrappers for AppInspect and ACS API calls, etc. In this way, in deploy.py an object such as ES could be created and its functions called at need.

This would make code more readable and modular

An idea:

deploy.py
modules/
  - splunkcloud.py   # providing logic to interact with Splunk Cloud
  - aws_s3.py  # providing logic to interact with AWS S3

[bdebek-splunk]

Made changes reflected in PR #69
Feel free to criticize and propose changes 😃