All flot dependencies should be specified in https://github.com/richwidgets/richwidgets project and [copied into its dist/ folder during distribution build](https://github.com/richwidgets/richwidgets/blob/master/Gruntfile.js#L169).

Then you should copy them to the [`META-INF/resources` in richfaces5 build](https://github.com/richfaces/richfaces/blob/master/framework/pom.xml#L291).