Python updates for 0.3.0

Python version: Made it a bit quicker by lowering the time between
requests to the Presto server when data is being recieved.
Added the runquery function.
Added C version of prestoclient 0.3.0

Features:
- Written in fast C code
- Only streaming data, so no big buffers to hold data
- Fully UTF-8 compliant
Added license files per version