Git 1.5.0 introduces support for worktrees. A worktree has a
.git file, rather than a folder. (The file contents points to to a
.git folder buried underneath the .git folder of the main repository.)

A new option has been added to resolve paths within the git dir,
`git rev-parse --git-path foo/bar`.

The commit uses this new facility, but falls back to the old approach
for backwards compability.

Fixes #969

Code of Conduct

Avoid depending on a hardcoded list of git global flags

Avoids mutating `globalFlags` until a match has actually been found.

Update EDITMSG copy

Before, the argument parser would translate `--help` and `--version` to
their equivalents without the dashes. Now it's not the parser's
responsibility to do that anymore. Instead, wire them up as subcommand
aliases in the runner.

This relieves `slurpGlobalFlags` of having too many duties

We used to recognize git global flags based on a hardcoded list.
Whenever git added more global flags, we didn't support them in hub
until we updated the list.

Now, treat all flags coming before the subcommand as global flags. These
are the rules:

1. Initially, every argument except `--help` and `--version` that starts
   with a `-` is considered to be a global flag.

2. Additionally, `-c` and `-C` flags have a value.

3. When an argument appears that doesn't match the above rules, assume
   that it's the git subcommand and stop global args parsing.

Fix spurious test failure when GIT_EDITOR is set

`git var` checks the `$GIT_EDITOR` environment variable before the `core.editor` config knob. `TestGitDir` intends to verify that the latter is respected, so sanitize the environment before running the test and restore it upon completion.

Support coloring console on Windows

Introduce github.com/mattn/go-colorable to solve the console color
issues on Windows

bitbucket.org/kardinaos/osxt was removed and github.com/inconshreveable/go-update has changed to use github.com/kardianos/osext. Not bumping go-update will prevent upgrade of other packages with `godep save -r ./…`

Fix password insertion more than 15 characters on Windows

Bumping to the latest gopass. This fixes https://github.com/github/hub/issues/837.

After `browse` was indicated as "GitExtension: false", it now gets
automatically parsed by pflag library. That has an adverse effect that
it loses information about the `--` value being passed, since pflag
treats it as terminator value and swallows it silently.

Now, introduce the `args.Terminator` property to check if terminator was
present or not, and use that in `browse` to restore previous behavior.

The `browse` command is not an extension to an existing git command.

Fixes #918

Add OSX build to Travis

Faster than `brew install tmux` which depends on openssl package

Travis `cache` directive doesn't seem supported on its osx environment.

This is needed for the osx Travis environment which apparently doesn't
support built-in caching.

This reverts commit 3cba4e5d.

Use `--no-tags` for new remotes in `checkout/cherry-pick`

This is so the tags from the automatically-added remote (typically
someone's fork) don't spill in and mix with the current tags.

fix non-portable GNU find(1)-ism

GNU find(1)'s -not operator is not POSIX compliant.  Use ! operator
instead in order to work with other find(1) implementations.

useHttpProtocol => useProtocol, allow ssh config

`useHttpProtocol` has been changed to a more generic `preferedProtocol`
function that can be used to check the users hub.protocol settings. This
allows us to use the SSH protocol in any location, regardless of the
repository being private or public.

```
% git config --global hub.protocol ssh
% ./hub --noop clone github/hub
git clone git@github.com:github/hub.git
% git config --global hub.protocol https
% ./hub --noop clone github/hub
git clone https://github.com/github/hub.git
% git config --global hub.protocol none
% ./hub --noop clone github/hub
git clone git://github.com/github/hub.git
```

Tests were also added for `HUB_PROTOCOL = ssh`.