Migrated to more recent bouncy castle

git-svn-id: https://etee.svn.codeplex.com/svn@23118 555e8bc2-ad3d-4a22-a156-a42dcab9bd6f
Made checkt of ETK optional

git-svn-id: https://etee.svn.codeplex.com/svn@23119 555e8bc2-ad3d-4a22-a156-a42dcab9bd6f
Extended library to allow business input & output with postmaster

git-svn-id: https://etee.svn.codeplex.com/svn@23126 555e8bc2-ad3d-4a22-a156-a42dcab9bd6f