added a readme chapter for prospective authors; added commands for referring to the Isar Reference Manual
set quick_and_dirty;
no_document use_thy "Base";
use_thy "Intro";
use_thy "FirstSteps";
use_thy "Parsing";
no_document use_thy "Package/Simple_Inductive_Package";
use_thy "Package/Ind_Intro";
use_thy "Package/Ind_Examples";
use_thy "Package/Ind_General_Scheme";
use_thy "Package/Ind_Interface";
use_thy "Appendix";
use_thy "Recipes/NamedThms";
use_thy "Recipes/Transformation";
use_thy "Recipes/Antiquotes";
use_thy "Solutions";
use_thy "Readme";