Updated checkmail plugin to honour resource_defaults of user group


git-svn-id: http://svn.resourcespace.org/svn/resourcespace@4202 c08608d7-6e46-0410-86ca-f2a6f1370df5
Amended preview.php so that watermarked screen versions can be seen if available


git-svn-id: http://svn.resourcespace.org/svn/resourcespace@4203 c08608d7-6e46-0410-86ca-f2a6f1370df5
Initial commit
Merge branch 'master' of github.com:rzamana/resourcespace