* Tidied up some help comments.
* Creating test_diff.py from test_rm.py.
* Converted module name and comments to refer to diff subcommand.
* Added --use-root and --root-prefix to diff subcommand.
* Fixed issue #71.
* Missed a conversion from 'diffroot' to 'diff' some time ago. Fixed.
* Forgot to mention last time that issue #58 is complete as well.
* Renamed test_identical_targets to test_identical_trees.
* Added and debugged test_file_vs_dir(). Takes care of issue #74.
* Added test_identical_files() - still need to debug.
* Moved code in get_dir_items_from_db() pertaining to files to a separate function.
* Added code to diff_targets to handle file targets and file vs. dir targets.
* Debugged test_identical_files() in test_diff.py. Resolves issue #57.
* Fixed some comments in test_diff.py.
* Added test_dissimilar_trees() to test_diff.py. Resolves issue #59.
* Added test_output_option() to test_diff.py. Resolves issue #61.
* Added test_use_root_option() to test_diff.py. Resolves issue #72.
* Added test_root_prefix_option() to test_diff.py. Resolves issue #73.
* Removed a bunch of commented code.
* Added test_invalid_target_left() to test_diff.py.
* Added test_invalid_target_right() to test_diff.py.
* Added test_invalid_target_both() to test_diff.py.
* Adding test_dupe_files.py.
Merge remote-tracking branch 'origin/dev' into dev
* Updated test_dupe_files.py with code from test_diff.py.
* Completed test_identical_trees() in test_dupe_files.py. Completes issue #52.
* Added and debugged test_single_tree_with_duplicates() to test_dupe_files.py, which resolves issue #53.
* Removed some commented code from test_dupe_files.py.
* Added and debugged test_output_option() to test_dupe_files.py. Closes issue #62.
* Added and debugged test_dissimilar_trees() to test_dupe_files.py. Closes issue #54.
* Added and debugged test_single_tree_without_duplicates() to test_dupe_files.py. Closes issue #55.
* Added a new schema, schema 3, to brd_unit_base.py.
* Adding test_dupe_trees.py from test_dupe_files.py.
* Cleaned some commented code out of test_dupe_files.py.
* Fixed some python3 conversion issues related to dupe_trees.
* Fleshed out TestDupeTrees.
* Added and debugged test_identical_trees() to test_dupe_trees.py. Resolves issue #63.
* Added test_dissimilar_trees() to test_dupe_trees.py, however it is not generating expected output. Suspect bug in brd. Added issue #78.
* Added test_output_option() to test_dupe_trees.py, however it is not generating an output file. Suspect bug in brd. Added issue #79.
* Removed deprecated function tokenize_path().
* Removed deprecated function get_root_from_db().
* Added additional debug messages to dupe_trees().
* Fixed an issue where entries were being accidentally deleted from dirs_by_parent. I think this is related to the transition to python3. This resolves issue #78.
* Updated directory fingerprint in test_identical_trees() and test_output() of test_dupe_trees.py.
* Added and debugged test_nofilefp_option() to test_dupe_trees.py. Closes issue #66.