Addition to the Mac section of the ANT build to associate new BEAUti documents with the application.
Addition to the Mac section of the ANT build to associate new BEAUti documents with the application.

git-svn-id: 67bc77c75b8364e4e9cdff0eb6560f5818674cd8@4635 ca793f91-a31e-0410-b540-2769d408b6a1

svn2github/beast-mcmc,armanbilge/BEAST_sandbox,svn2github/beast-mcmc,svn2github/beast-mcmc,svn2github/beast-mcmc,armanbilge/BEAST_sandbox,armanbilge/BEAST_sandbox,svn2github/beast-mcmc,armanbilge/BEAST_sandbox,armanbilge/BEAST_sandbox