Jupytext

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**Added**

- Multiline comments now supported [25](https://github.com/mwouts/jupytext/issues/25)
- Readme refactored, notebook demos available on binder [23](https://github.com/mwouts/jupytext/issues/23)

**Fixed**

- ContentsManager can be imported even if `notebook.transutils` is not available, for compatibility with older python distributions.
- Fixed missing cell metadata [27](https://github.com/mwouts/jupytext/issues/27)
- Documentation tells how to avoid creating `.ipynb` files [16](https://github.com/mwouts/jupytext/issues/16)

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**Added**

- Added test for R notebooks
- Added pylint badge, imports now in correct order
- New `active` cell metadata that allows cell activation only for desired extensions (currently available for Rmd and ipynb extensions only)

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**Fixed**

- Indented python code will not start a new cell [20](https://github.com/mwouts/jupytext/issues/20)
- Fixed parsing of Rmd cell metadata [21](https://github.com/mwouts/jupytext/issues/21)

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**Added**

- `.py` format for notebooks is lighter and pep8 compliant

**Fixed**

- Default nbrmd config not added to notebooks ([17](https://github.com/mwouts/jupytext/issues/17))
- `nbrmd_formats` becomes a configurable traits ([16](https://github.com/mwouts/jupytext/issues/16))
- Removed `nbrmd_sourceonly_format` metadata. Source notebook is current notebook when not `.ipynb`, otherwise the first notebook format in `nbrmd_formats` (not `.ipynb`) that is found on disk

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**Added**

- Introducing support for notebooks as python `.py` or R scripts `.R`

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**Added**

- Introduced `nbrmd_sourceonly_format` metadata
- Inputs are loaded from `.Rmd` file when a matching `.ipynb` file is opened.

**Fixed**

- Trusted notebooks remain trusted ([12](https://github.com/mwouts/jupytext/issues/12))