Task

- Tag add/remove details improved.
Parser

- Added exact match shortcut.
- Changed order of command matching to reduce changes of the log/logo problem.
- Corrected logic where an "else if" should have been an "if".
- Removed commented-out diagnostics.
Parser

- ::findCommand now checks for any abbreviated command.  If it finds either an
  exact match, or no ambiguity, it checks again to determine READCMD, WRITECMD
  or HELPER.
args

- Entered a complete and current entity set, for testing.
Task

- When no modifications are provided, but are expected, complain.