Allow --csr

<a href="https://github.com/kuba"><img src="https://avatars.githubusercontent.com/u/106176?v=3" align="left" width="96" height="96" hspace="10"></img></a> **Issue by [kuba](https://github.com/kuba)**
_Saturday Nov 28, 2015 at 18:59 GMT_
_Originally opened as https://github.com/kuba/simp_le/issues/13_

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