clean up swig warnings a bit

git-svn-id: https://svn.salilab.org/imp/trunk@16882 e91f8c7b-0e32-4433-a9ac-4502d39a4eab
Fix typo.


git-svn-id: https://svn.salilab.org/imp/trunk@16883 e91f8c7b-0e32-4433-a9ac-4502d39a4eab
Ensure our output appears at the start of the output file.


git-svn-id: https://svn.salilab.org/imp/trunk@16884 e91f8c7b-0e32-4433-a9ac-4502d39a4eab
remove stray export symbols from cpp file

git-svn-id: https://svn.salilab.org/imp/trunk@16885 e91f8c7b-0e32-4433-a9ac-4502d39a4eab