Added info about kaitai stream API

Author: brettged

kaitai/README.md

@@ -16,7 +16,9 @@ A Kaitai Struct download provides two main tools in order to develop the code as
 
   * See `simple_kaitai_example/` for a worked example, or visit the [Kaitai Struct Documentation](https://doc.kaitai.io/user_guide.html).
 
-  * Kaitai also has an interactive [webIDE](https://ide.kaitai.io/) with examples of many popular data/file formats.
+  * Kaitai also has an interactive [webIDE](https://ide.kaitai.io/) with examples of many popular data/file formats. You can also import your own .ksy schema format and corresponding data file into the tool.
+
+  * The [Kaitai Stream API](http://doc.kaitai.io/stream_api.html) is a critical piece of the puzzle if you're actually trying to incorporate the code generated by Kaitai into a project. These runtime libraries exist for all languages supported by Kaitai and are essentially a wrapper around the languages native I/O libraries. For compiled languages and depending on your compilation environment you may need to include the appropriate header file in your generated code. For example, in C++ you will need to add a line reading `#include kaitaistream.h` to the header file you generated for your format. Interpreted languages such as Python and Ruby require the installation of the kaitaistream package.
 
 
 ## Sample Structures for Binary Data