Document methods inside the Classes

[purencool]

Create comments in the classes for easier understanding of the application

[geek-boy]

@purencool can you move the ApiResponseCodes class to be part of the Controller namespace ?

[geek-boy]

Document the return value for saveQueryResults() method as Mixed - an Array on success.
Need to modify a failure as a empty array.

[geek-boy]

Document the getQueryJobID() method as returning String

[geek-boy]

Document the makeApiRequest() request method