Update doc about `get` command

Add description about `get` with `-p` option.
This option introduced by https://github.com/motemen/ghq/pull/7 .
Support remote repository installation except Github or GHE, Google code.
And save it same path with repository URL.
test ghq get
Merge pull request #8 from tcnksm/support-other-repository

Support other remote repository installation
Merge pull request #9 from tricknotes/update-doc-about-get

Update doc about `get` command
wercker banner
search for .git and .hg dirs
include branch in version
Improved zsh completion

Complete options for sub commands
Complete global options
Don't use global variables
Exit when VCS is not found
Move building url logic to NewURL
Support same name repository
Merge pull request #12 from mollifier/improve-zsh-completions

Improved zsh completion
Merge pull request #13 from tcnksm/panic-without-vcs-backend

Exit when VCS is not found
$ gofmt -w commands.go url.go url_test.go
Remove debug code
Merge pull request #14 from Sixeight/patch/same-name-repository

Support same name repository, closes #4
gofmt
use master branch for wercer status
Squashed commit of the following:

commit 044bd656d6c7b810ccfa70411a566601bef4ae62
Author: motemen <motemen@gmail.com>
Date:   Tue Jun 10 15:03:55 2014 +0900

    remove remotes/origin/

commit 5907bba9738a1dc966819701e1d83ac3a221cd57
Author: motemen <motemen@gmail.com>
Date:   Tue Jun 10 13:06:29 2014 +0900

    include version string

commit e8ae41ab249d2e827243f7c1cf955af5c9db7b4c
Author: motemen <motemen@gmail.com>
Date:   Tue Jun 10 13:00:00 2014 +0900

    || true

commit af15d23e1f75b99933e7a7d2cb8afaee45800475
Author: motemen <motemen@gmail.com>
Date:   Tue Jun 10 12:55:33 2014 +0900

    output tag to file

commit 9d04c44321f4af20dc444695bf799d2369ce5939
Author: motemen <motemen@gmail.com>
Date:   Tue Jun 10 09:51:34 2014 +0900

    shrink yml

commit d5d8ed4867adb918f0b8f2de9ec3e364dbe13cbb
Author: motemen <motemen@gmail.com>
Date:   Tue Jun 10 00:59:57 2014 +0900

    no para 1

commit 075ac5bcbdb99ab6fee4b4a7c8757e99e6bdda25
Author: motemen <motemen@gmail.com>
Date:   Tue Jun 10 00:55:18 2014 +0900

    deploy: create github release

commit 13e047a81bad2d0f94b397e37aa28f968d5e5a15
Author: motemen <motemen@gmail.com>
Date:   Tue Jun 10 00:48:09 2014 +0900

    use WERCKER_OUTPUT_DIR

commit 9635d33b93b641e827380d4992de791c17e52811
Author: motemen <motemen@gmail.com>
Date:   Tue Jun 10 00:33:49 2014 +0900

    parallel=1

commit 8da4e1687e1bfbb3fd8e0a5b6e672c0ac28045ca
Author: motemen <motemen@gmail.com>
Date:   Tue Jun 10 00:23:10 2014 +0900

    no sudo

commit b22a06976993ee80315a7b37ad78bc6bcaaee5ff
Author: motemen <motemen@gmail.com>
Date:   Tue Jun 10 00:19:44 2014 +0900

    update

commit d65675e5af23e8a644cb2e3c9a9695fd37f1132d
Author: motemen <motemen@gmail.com>
Date:   Mon Jun 9 19:34:26 2014 +0900

    sudo...?

commit f888a5d57efe28ce3fdb7fb6dc03f21b3c990c23
Author: motemen <motemen@gmail.com>
Date:   Mon Jun 9 19:31:21 2014 +0900

    cross-build on build phase

commit 47a8b2a90425df884c97648113dce79be12d4eb9
Author: motemen <motemen@gmail.com>
Date:   Mon Jun 9 19:22:41 2014 +0900

    add wercker.yml and test cross-compiling