Added index to examples

Author: jacobtomlinson

examples/README.md

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+# Examples
+
+
+## Getting started
+
+_Examples of getting data from DataPoint._
+
+* [Current Weather](current_weather/) - Get the current weather for a specified
+longitude and latitude.
+
+* [Simple Forecast](simple_forecast/) - Get a full 5 day forecast for a specified
+longitude and latitude.
+
+## Making Decisions
+
+_Examples which make decisions based on weather data._
+
+* [Umbrella](umbrella/) - Inform the user whether they need an umbrella today
+for a specified longitude and latitude.
+
+* [Washing](washing/) - Inform the user which day in the next 5 days would be
+the best for hanging out their washing for a specified longitude and latitude.
+
+## Mixing Data
+
+_Examples which makes use of other API's in conjunction with DataPoint._
+
+* [Tube or Bike](tube_bike/) - Inform the user whether they should cycle or
+take the tube across London, based on weather and tube service for two sets of
+longitude and latitude along with a tube line name.
+
+* [Postcodes](postcodes_to_lat_lng) - A variation on the [Current Weather](current_weather/)
+example but uses UK postcodes instead of longitude and latitude.