modularized features and added functions to list containers, files, and download individual files.

adding functions to upload and download files to/from a container

adding feature to make container cdn enabled when creating it.

refactoring usage of RcfMgr module

added cli flow control to upload and delete files as well as create containers.

adding feature to read config from ~/.config/rcfmgr.ini

cleaning up some minor error handling

fixing up readme and some minor output changes

adding examples to readme

improved output