Deprecate camelcase function and method names, replacing with snake case names

[chuckwondo]

Python's naming convention uses snake case names for function and method names. Function and method names using camel case should be deprecated for replacement with snake case names. For example, the Result.getData method should be deprecated in favor of the name Result.get_data (although, in this case, download is perhaps a more appropriate name for this method to better indicate a file is being downloaded, not that the method is actually returning data to the caller).