Some additions to the Skygrid in order to accommodate different ploidy type

git-svn-id: http://beast-mcmc.googlecode.com/svn@6525 ca793f91-a31e-0410-b540-2769d408b6a1
Some more changes to the Skygrid to account for differences in ploidy

git-svn-id: http://beast-mcmc.googlecode.com/svn@6526 ca793f91-a31e-0410-b540-2769d408b6a1
Issue 746:	Allows you to have a custom $HOME/lib directory

git-svn-id: http://beast-mcmc.googlecode.com/svn@6527 ca793f91-a31e-0410-b540-2769d408b6a1