Sortable/CONTRIBUTING.md

# Contribution Guidelines


### Issue

 1. Try [dev](https://github.com/RubaXa/Sortable/tree/dev/)-branch, perhaps the problem has been solved;
 2. [Use the search](https://github.com/RubaXa/Sortable/search?q=problem), maybe already have an answer;
 3. If not found, create example on [jsbin.com (draft)](http://jsbin.com/zunibaxada/1/edit?html,js,output) and describe the problem.


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### Pull Request

 1. Before PR run `grunt`;
 2. Only into [dev](https://github.com/RubaXa/Sortable/tree/dev/)-branch.