Contributing

With issues:

Open your pull request against dev.
Open one pull request for only one feature/proposal, if you have several those, please put them into different PRs, whereas you are allowed to open one pull request with several bug-fixs.
Your pull request should have no more than two commits, if not, you should squash them.
It should pass all tests in the available continuous integrations systems such as TravisCI.
You should add/modify tests to cover your proposed code changes.
If your pull request contains a new feature, please document it on the README.