[ci skip]

`browse` command will act buggy for subpages without this.

Fixes #682

`hub remote add origin` and `hub remote add MY-USERNAME` will now act as
if `-p` was given and automatically assign private (SSH) URLs instead of
public ones, because the fact that these are your repos means you have
write access.

https://github.com/cucumber/cucumber/pull/774

This is now handled by Travis

References #733

Encode special characters in branch names for `compare` command

Because the branch name becomes a URL component, special characters like
`#` need to be URI-encoded. Some characters are exempt from encoding:

* `/` can occur literally in a branch name
* Characters like `!.*'()` are allowed in URLs
* Characters like `^:~` are NOT encoded because git doesn't allow them
  in branch names, but they can be used in Compare view for stuff like:
  - `mislav:master`
  - `feature^`
  - `feature~3`
* If you specify a range for Compare, nothing is escaped and the caller
  is responsible for encoding branch names properly. This is because
  such expressions can include stuff like `@{1 week ago}` that
  branch-encoding would totally mess up.

Improve authentication process

* In case of wrong password, "Bad credentials" will now show
* In case of a user trying to paste their Personal Access Token (which
  won't work as a substitute for password here), a message stating that
  you have to use your actual password will now show.

Previously, an invalid 2FA code would abort the process and the user
would have to restart authentication from scratch. This was fixed with
the recent modifications to authentication process, and now it's tested.
It also displays a helpful warning about the previous code being invalid.

* it's `required; app` instead of `required;application`
* there is a JSON error message in the 401 response

If there's already an Access Token named "hub for {USER}@{HOSTNAME}",
add a number in the end and increment it maximum of 9 times until saving
of the Access Token succeeds.

Previously, the description for the token was simply "hub". Now, it's:

    hub for {USER}@{HOSTNAME}

This reduces the chance of token name collisions when the same user uses
hub to authenticate from different machines, as well as serves as
information to distinguish between various tokens in user's Personal
Acess Token list.

Due to upcoming GitHub API changes, the "token" field will not be
accessible anymore, which will make it impossible for hub to re-use an
existing token that might have been generated for another computer.

Now, a new Access Token will be created every time hub needs to exchange
the username/password credentials for an OAuth token.

https://developer.github.com/changes/2014-12-08-removing-authorizations-token/

Fixes #695

When running through `bundle exec`, Bundler will have loaded URI already
which will make our speedy_stdlib skip redefining it.

Aggressively undefine URI if loaded through Bundler so that our tests
perform against our implementation, not the stdlib one.

When `url.scheme` is changed from "https" to "http" when someone
configured their Enterprise instance to be used over insecure protocol,
the "speedy" implementation changed the port as well, but the stdlib
implementation doesn't. Things would break if someone used hub in an
environment where stdlib URI was already loaded, like for instance from
RubyGems.

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

Port a bunch more tests to cukes