still not working but a beginning of tip4p for symmtery


git-svn-id: https://svn.ices.utexas.edu/repos/clsb/trunk/moil@4848 90e2fc84-bd37-0410-82f1-ae2f889bfac2
some progress on tip4


git-svn-id: https://svn.ices.utexas.edu/repos/clsb/trunk/moil@4849 90e2fc84-bd37-0410-82f1-ae2f889bfac2