* Initialize tab completion later, so that added commands get completion (Thanks @damiankloip!)
 * Add a CodeCleaner pass to make `exit;` act like the `exit` command (Thanks @damiankloip!)
 * Don't assume the presence of `argv` in `$_SERVER`.
 * Add color mode overrides, via `colorMode` configuration and `--color` or `--no-color` flags (Thanks @toddmazierski!)
 * Add a `useUnicode` config option. Set this to false to avoid non-ascii characters in PsySH output, for example if you're on Windows and don't want to fight with code page configuration.
 * Update README, documentation, etc (Thanks @dereckson and @ReadmeCritic!)