Changed rdoc generation to default to watir.rb and readme.rb, added another task to generate all rdocs for contrib, watir/*.rb files. 
Changed rdoc generation to default to watir.rb and readme.rb, added another task to generate all rdocs for contrib, watir/*.rb files. 

watir/watir-classic,watir/watir-classic,jarib/watir,jarib/watir,jarib/watir,watir/watir-classic,watir/watir-classic