Version 2

## Changes
Completely removed dependency on [shenzhen](https://github.com/nomad/shenzhen), and I'm instead now using the built-in `xcodebuild`.

Please check out the online [man page for `xcodebuild`](https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man1/xcodebuild.1.html) or simply run `$ man xcodebuild`.


## todo
- [ ] Write `README.md` with examples
- [ ] Plugin options
  - [ ] `workspace` option
  - [ ] `configuration` option
  - [ ] `provisioning profiles`
  - [ ] `sdk` option
- [ ] Unit tests

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Would love some feedback on the code so far, and what you guys want to see in the project.