Old `script/bootstrap` & `script/build` were unfriendly to Go newbies
because they require the user having GOPATH set in their environment,
and either `godep` installed or `hg` to be able to fetch godep.

However, since dependencies are vendored, we don't have any real build
dependencies except Go itself.

- `script/bootstrap` now checks Go and installs Ruby test bundle
- `script/build` skips compiling if binary is up to date
- `script/test` runs both Go and Cucumber test suites

We should come back to supporting the old hub-prefixed config options, though.

Go otherwise respects HTTP_PROXY environment variables by default, but
special-cases requests made to "localhost" or 127.0.0.1 by disabling
proxy for them, which makes me a sad panda since I want to debug the
requests hub makes to our local test server.

https://code.google.com/p/go/source/browse/src/pkg/net/http/transport.go?name=go1.2#544
https://code.google.com/p/go/issues/detail?id=7256

This un-fucks ProxyFromEnvironment by reimplementing it without the
bizarre limitation.

Even for blank responses, 404s and error pages. Otherwise Sawyer chokes.

gh should be compiled and named `./hub` in the project root

Advantages over scripts in `script/`:

- Works without gopath
- Works without godep

Conflicts:
	.gitignore
	.travis.yml
	Gemfile
	Gemfile.lock
	script/test

If the user is currently on the "feature" branch that is pushed to their
fork, when they do `hub browse -- issues` it should open issues of the
main (canonical) repository, not that of the fork.

When a user would do `hub browse` on the master branch and they had a
fork, the hub would open the browser with their fork instead of the
upstream project. This is surprising and unwanted, so I've added an
exception for this case.

Fixes #474

Fixes #470

Fix `hub fork` command in cases when GitHub fork is not yet ready for fetching

Forking through GitHub's API is asynchronous so there is really no way
of knowning when you can access git objects without polling.
Alternatively, we can establish the state of the fork with its remote
tracking branches and tags by fetching from the "origin" remote and then
changing the remote url to the fork.

Pull in Hub compatible fixes https://github.com/github/hub/commit/efe8c97e46f6377db11bf8acd62f43a2beef7dea

Pull in Hub compatible fixes in https://github.com/github/hub/commit/f60fb89274d276034e5c7c2d65f27d36dcfac685

Avoids the issue where leading empty lines would result in an empty
pull request title.

Fixes #439, closes #465

This only affects CI builds in cases when the bundle is not cached.

Fixes test failures with Boxen git 1.8.2-boxen1

They emit Ruby warnings on Ruby 2.1.0

Fixes #466

Fix typo

This is required on systems like Exherbo where installation is first
done in a sandbox.

Closes #458

Add contributing guide

Enable bash completion tests on Travis

We could delegate all the flags back to `git-help`