v0.4.5

Because the Splunk API is so incredibly slow, this release ditches it's oneshot() function in favor of the lower-level Splunk Jobs API. Since we had to write our own results retrieval code, we used Python's built-in multiprocessing module to retrieve results in parallel. The default is now to retrieve results with a single worker, which decreased total search time by about 45% while retrieving 1mil rows in testing.