This adds hub version to crash report. It includes refactoring of hub version to the `version` package for reusability in `commands` package and `github` package.

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

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

This reverts commit 3cba4e5d.

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

Verified from Homebrew that this it can parse the version with this format (https://github.com/Homebrew/homebrew/blob/master/Library/Homebrew/version.rb#L259-L332). The previous URL works for `x.x.x` but not `x.x.x-rc1`.

Ending package name with `vVERSION` allows Homebrew to recognize the build version in `brew install`. See https://github.com/boxen/puppet-hub/pull/10#issuecomment-71783691

so that the version number is always echoed on stdout.

Tarballs are traditionally .tar.gz, not .gz.tar

* Friendly OS name for packaged zips
* Options to skip test and toolchain building
* Fix problems running on Windows

When hub is installed via Homebrew, Homebrew does a shallow clone of the
hub repo and so the describe --tags call in this script fails and bash
halts the script there.

Allowing the script to turn through will allow the fallback block to run.

Closes #745 [ci skip]

This is now handled by Travis

Conflicts:
	.travis.yml
	script/bootstrap

The best way to run this is in the GitHub for Windows shell.

This makes our build scripts even more simpler. To build with autoupdate, run `go build -tags autoupdate`

If there’s no GOPATH set up locally, Go won’t be able to find sub packages. This is due to changes in https://github.com/github/hub/commit/af9163b699b34ffa167ef99853ff2f7374d7b01a.

Use the `-ldflags` to change version at the linker. See http://golang.org/cmd/ld.

Issue: https://github.com/github/hub/issues/672#issuecomment-62040388

Also fix a output typo in autoupdate which is never runs

We need to run the packaging script for every platform using a Vagrant box. During the packaging step, cukes are run. However, the workspace is shared between host and the Vagrant box. Instead of cleaning up the built binary for each platform, build it into a temporary dir.

* Prefer Ruby script to `gotask` script for packaging task
* Clean up Vagrant file
* Prefer `gox` to `goxc`

Fixes CI in forked environment and enables usage of `cached-bundle`
script to just restore caches from S3 but never attempt to write them.

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