Removed the requirement of passing flags throughout ICG indicating if we are
in an inherited class or not. Removed the init_attr friends throughout
Trick core headers.
Moved field offset calculations for inherited classes to when the inherited
classes are processed. This removes the need to have to remember if fields
were inherited or not, the offset already reflects the correct offset.
refs #218
Changed all header file once include variables to follow the same naming
convention and not start with any underscores. Also deleted old
incorrect copyright notices. Also removed $Id: tags from all files.
Fixes#14. Fixes#22.
