- added convenient management of global options via `Hashugar::OPTIONS`, a Struct with custom behavior
- added capability of `Hashugar` to enable translation of all hyphens in Hash keys into underscores via runtime method replacement
- todo: look into privacy of `stringify_keys` and see if we can't tighten things up a bit more
- removed files in `/vendor/` recursively from cached index (what where they doing in there...)