Get the current weather and store the information in individual files.

Get the weather from Yahoo and store the following values in individual
files:
 - conditions
 - image
 - temperature
 - visibility
 - wind direction
 - wind speed

Storing all the values in individual files is easier to arrange them in
Geektool.
Merge pull request #4 from rubenvarela/get_weather

Get the current weather and store the information in individual files.