Ensure Chamber loads Chamber::Instance in bin/chamber

The problem is that
https://github.com/thekompanee/chamber/blob/master/lib/chamber/commands/initialize.rb#L13
calls `Chamber.configuration` which is part of the `Chamber::Instance` class
that the `Chamber` singleton delegates to via method_missing. Since the
`bin/chamber` file only includes `chamber/binary/runner`, the `Chamber`
singleton is never correctly initiated.

Actions:
  Fixes #29
Merge branch 'ted27-patch-1'