[ANN] Tork 19.4.0 - test with fork

Tork runs your tests as they change, in parallel:

  1. Absorbs test execution overhead into a master process.

  2. Forks to inherit overhead and run test files in parallel.

  3. Avoids running unchanged tests inside changed test files.

See http://sunaku.github.io/tork and https://github.com/sunaku/tork

## Version 19.4.0 (2013-11-25)

Minor:

  * The "rails" configuration helper now automatically sets up your test
    database for Tork's parallel testing system if your test database is
    SQLite3 and you are using Rails 3 or newer.

Other:

  * rails: remove unused capture of rescued exception

  * coverage: document the use of Ruby 1.9 hash syntax

  * rename `*.markdown` file extension to shorter `*.md`