- Ruby is not required at runtime anymore
- Most installation instructions are now obsolete. Will need to write
  new instructions when we distribute precompiled binaries.
- Remove tedious parts about slowness. It's not slow anymore!

This lets github.project implement its own comparison logic. For
instance, two projects can be the same even though their `Protocol`
values don't match.

Port latest batch of cukes from master to gh

This allows someone to have something like this in their SSH config:

    Host gh
      HostName github.com

And then use git remote URLs such as:

    gh:myname/myrepo.git

Since git itself allows people to do this, we need to support it in hub.

Port `cherry-pick`, `pull-request` tests to cukes

Port a bunch more tests to cukes

[gh] Merge in master (v1.12.2) and fix all tests

Fix `git --noop clone` with private repos

Fixes #593

expect(x).to_not returns false when the test passes, so using history.all? only
checks the first element of the list. Since expect raises anyway, we
don't need to bother anyway.

As suggested by @mislav, the the previous assertion only checked against
"git clone" without parameters.

Conflicts:
	Gemfile.lock
	features/browse.feature