Added new doxygen style tags for truning on/off Trick attributes processing,
comment processing, and library dependencies. Here are the tags we recognize
(@|\)trick_parse(everything|attributes|dependencies_only)
(@|\)trick_exclude_typename(class_name)
(@|\)trick_link_dependency(link_name)
refs #114
Found that on the Mac ICG was ignoring all of header files comments in ${TRICK_HOME}/include because it had the relative directory "include" listed as a system path. Comments were only processed if it wasn't in a system directory. Changed the check to use our function that checks to see if a header is in user or Trick code, basically the same check, but it only uses full paths and doesn't get confused with "include".
refs #63
Found that my check for embedded classes was also catching some typedef structures.
This was causing some io_src code not to be generated. Changed the test so that
we can differentiate between embedded classes and the typedefs.
This change fixes#10 and fixes#23.
