bugfix TDFileSystemDirectoryNode>>addChildFileSystemLeafNode: ... add TDGemStoneTool>>gsfileoutClass:header:on:
tests for `mv` and `cp` commands (about time) ... leaf-based `mv` and `cp` tests written and passing for obj to obj operations ...
add cp/mv over self to test cases ...
started 'cp directory to directory' series of tests/implementation
checkpoint: finally get semantics for `cp <dir> <existing-dir>` correct ... update the `cp` man page.
checkpoint: filled out set of tests for `cp` command ... leaf and directory nodes covered for all combos ... I think
checkpoint: rewrite `mv` man page ... a little refactoring ... cp:in: and mv:in: share quite a bit of code ...
checkpoint: refactor mv:in: and cp:in: to share a bunch o code
checkpoint: filled out set of tests for `mv` command
checkpoint: preparing for fs to fs tests
checkpoint: `fs to fs` and `obj to obj` tests are passing
checkpoint: `fs to obj` and `obj to fs` tests are not passing:
  104 run, 83 passes, 0 expected defects, 18 failures, 3 errors, 0 unexpected passes

will need to do a little more double dispatching as the proxy nodes record their changes to disk (when backed by files) see the TDFileSystemDirectoryNode code which needs to be pushed out one more layer