Adding the Model to the Loop

[shahbuland]

Summary of changes:

• Created base model object and added setup for it to communicate with
• Modified client and CHEESE object to work with model
• Removed some old redundant code
• Created a pipeline that does not read from any dataset (i.e. to read from model generations directly)

Update (Sep 12):

• Remove init dataset from all pipelines because empty datasets are prone to errors
• Now infer dataset from first call to add row to dataset
• Tested with architext, though the code for this example will not be present in PR