Add missing svn $Id$ tags in new test files.


git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10340 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Fix indentation in recently added test/twowin.cxx demo.


git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10341 ea41ed52-d2ee-0310-a9c1-e6b18d33e121