Weather Forecast Example Script (#239)

* Example Weather forecast script

Used Adafruits example as base and adapted it for python-escpos
Weather icons taken from 
http://adamwhitcroft.com/climacons/

* Weather Icons from Adam Whitcroft

Weather Icons from http://adamwhitcroft.com/climacons/

* update authors

* Minor improvements

* Weather Script Debugged

Added one more Icon
Attributed Icons in readme.md
changed folder structure

* Change formatting

* Fixed pathing to graphics issue

* fixed image size

* autopep8 to clean up the code

examples/graphics/climacons/readme.md

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+# Climacons by Adam Whitcroft
+
+75 climatically categorised pictographs for web and UI design by [@adamwhitcroft](http://www.twitter.com/#!/adamwhitcroft).
+
+Visit the [Climacons](http://adamwhitcroft.com/climacons/) website for more information.
+
+Visit [Adam Whitcroft on GitHub](https://github.com/AdamWhitcroft)
+
+## License
+You are free to use any of the Climacons Icons (the "icons") in any personal or commercial work without obligation of payment (monetary or otherwise) or attribution, however a credit for the work would be appreciated. **Do not** redistribute or sell and **do not** claim creative credit. Intellectual property rights are not transferred with the download of the icons.