epw data

[d-e-t]

Most of solar_fun.py has been moved into thermal.py -- but not the weather data part. I'm not sure whether to try add this to the existing epw.py or create a new one. I mainly need the following:

• read epw files (from a local directory)
• return entire data set of 1-hour data as a large numpy structured array
• interpolate 1-minute data for a single day, and return as a numpy array