Merge pull request gcanti#95 from gcanti/contributing

add contributing guidelines

Author: gcanti

CONTRIBUTING.md

@@ -0,0 +1,55 @@
+# Contributing Guide
+
+Contributions are welcome and are greatly appreciated! Every little bit helps, and credit will
+always be given.
+
+## Issues Request Guidelines
+
+Before you submit an issue, check that it meets these guidelines:
+
+- specify the version of `tcomb-form-native` you are using
+- specify the version of `react-native` you are using
+- if the issue regards a bug, please provide a minimal failing example / test
+
+## Pull Request Guidelines
+
+Before you submit a pull request from your forked repo, check that it meets these guidelines:
+
+1. If the pull request fixes a bug, it should include tests that fail without the changes, and pass
+with them.
+2. If the pull request adds functionality, the docs should be updated as part of the same PR.
+3. Please rebase and resolve all conflicts before submitting.
+
+## Setting up your environment
+
+After forking tcomb-form-native to your own github org, do the following steps to get started:
+
+```sh
+# clone your fork to your local machine
+git clone https://github.com/gcanti/tcomb-form-native.git
+
+# step into local repo
+cd tcomb-form-native
+
+# install dependencies
+npm install
+```
+
+### Running Tests
+
+```sh
+npm test
+```
+
+### Style & Linting
+
+This codebase adheres to a custom style and is
+enforced using [ESLint](http://eslint.org/).
+
+It is recommended that you install an eslint plugin for your editor of choice when working on this
+codebase, however you can always check to see if the source code is compliant by running:
+
+```sh
+npm run lint
+```
+