Formatting

Rewrite token tree output using methods from `System.pas`:

  * `LazLogger` is not available on Delphi.
  * Separate output for multiple input files (in case of batch convert).
  * Will now always write tree dump on parsing error.
  * New `-debug` switch to redirect tree output to `stderr`.
      * Will do so even if there was no error in source code.

Update .gitignore

Allow specifying custom output file name in single file mode

Update