Update README.md

added diabetes api

README.md

@@ -192,6 +192,7 @@ A collective list of JSON APIs for use in web development.
 | USDA Nutrients | National Nutrient Database for Standard Reference | No | [Go!](https://ndb.nal.usda.gov/ndb/doc/index) |
 | Nutritionix | Worlds largest verified nutrition database | No, but `apiKey` query string | [Go!](https://developer.nutritionix.com/) |
 | Makeup API | Worlds only makeup API | No | [Go!](http://makeup-api.herokuapp.com/) |
+| Diabetes API | Logging and retrieving diabetes information | No | [Go!](http://predictbgl.com/api) |
 
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