Updated example to work with R-package distribution format.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/nwfscassmt@197 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Changed onLoad function for delta-GLMM package, so that it (1) automatically loads necessary packages and (2) provides information about installing JAGS.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/nwfscassmt@198 edb9625f-4e0d-4859-8d74-9fd3b1da38cb