0.2.0 Release of alda-mode

* 0.2.0
- WARNING: ~alda-stop~ has been renamed to ~alda down~ for consistency with the ~alda~ command line.
- Fix windows support
- Add support for alda history
  - ~alda-history-clear~
  - ~alda-history-append-region~
  - ~alda-history-append-buffer~
  - ~alda-history-append-block~
  - ~alda-history-append-line~
- New ~evil~ operator: ~alda-evil-history-append-region~
- Add support for stopping playback via ~alda-stop~
- Add dedicated CI and unit tests!

Initial Frozen Release

Includes all features needed for a self-respecting language major mode,
such as syntax highlighting and indentation.

Also includes (a unique) feature to play section or files of alda code
right from Emacs.

Tested with alda 1.0.0-rc56