Moved the header files and the swig .i files to include/trick/swig. Adjusted the
source files and the convert_swig script to find the headers in their new
location.
refs #67
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.