updated readme.

Author: jacobwilliams

README.md

@@ -148,7 +148,7 @@ many of that code's bugs.
 Documentation
 --------------
 
-The API documentation can be found [here](http://jacobwilliams.github.io/json-fortran).  The documentation can also be generated by processing the source files with [RoboDoc](http://rfsber.home.xs4all.nl/Robo/). 
+The API documentation can be found [here](http://jacobwilliams.github.io/json-fortran).  The documentation can also be generated by processing the source files with [RoboDoc](http://rfsber.home.xs4all.nl/Robo/).  Note that both the shell script and CMake will generate these files automatically in the documentation folder, assuming you have RoboDoc installed. 
 
 More About JSON
 ------------