Added cast functions similar to shared_ptr


git-svn-id: http://casacore.googlecode.com/svn/branches/nov14@21516 6afa274c-0927-0410-9b47-a1284d797885
Needed to install the new DataMan.h and TaQL.h

git-svn-id: http://casacore.googlecode.com/svn/branches/nov14@21517 6afa274c-0927-0410-9b47-a1284d797885
Added new functions from NRAO


git-svn-id: http://casacore.googlecode.com/svn/branches/nov14@21518 6afa274c-0927-0410-9b47-a1284d797885
Needed to add casacore/ to some #include

git-svn-id: http://casacore.googlecode.com/svn/branches/nov14@21519 6afa274c-0927-0410-9b47-a1284d797885
Added 2D routines


git-svn-id: http://casacore.googlecode.com/svn/branches/nov14@21520 6afa274c-0927-0410-9b47-a1284d797885