added version number to the Core class
Merge branch '3.3/develop' into 3.3/feature/kadoc
minor wording correction
added index stub
added introduction
removed unnecessary @category comments
minor coding style tweaks
after f222de2 proved to work this RESTful_HTTP_Exception is obsolete

closes #17
minor whitespace and comments tweaks
Merge branch '3.3/develop' into 3.3/feature/kadoc