Version 0.7

* New features
  ** tabline
    *** new highlight for unmodified inactive
    *** can enable bindings for predictable number-based tab numbers
    *** unique_tail and unique_tail_improved formatters
  ** whitespace extension: can handle some common mixed indent rules
  ** extensions: capslock, netrw, nrrwrgn, promptline, quickfix, tmuxline, windowswap
  ** themes: durant, hybrid, kalisi, kolor, raven, silver
* Improvements
  ** countless refinements and bug fixes