v0.6.3

• When running precious config init and asking for the Perl or Rust components, precious would tell you to install omegasort even though the generated config did not use it. Reported by Olaf Alders. GH #61.
• If precious was run with --staged and a file that was staged had been deleted from the filesystem but not removed with git rm, it would exit with a very unhelpful error like Error: No such file or directory (os error 2), without any indication of what the file was. Now it will simply ignore such a deleted file, though it will log a debug-level message saying that the file is being ignored. Fixes #63.