Categorise photos and add descriptions
I have began adding descriptions on the [description branch](https://github.com/neutraltone/Awesome-Stock-Resources/tree/descriptions). Currently they are very untidy and difficult to read. I have a few options.
1. Break down photo's into sub-headings, perhaps by license.
2. Use license only as description and save descriptions for only the unique / specialist resources.
3. Sort list by subject matter categories. This could be problematic due to the a large number of the resources containing a varied range of subject matter.

Comments welcome regarding how to approach this.
