------------------
**Added**
- Jupyter magic commands escaped when exported ([29](https://github.com/mwouts/jupytext/issues/29))
- 'endofcell' option for explicit (optional) end-of-cell marker ([31](https://github.com/mwouts/jupytext/issues/31))
- 'active' cell option now supported for .py and .R export ([30](https://github.com/mwouts/jupytext/issues/30))
- Raw cells now preserved when exported to .py or .R ([32](https://github.com/mwouts/jupytext/issues/32))
- Extensions can be prefixed, like `.nb.py`, (mwouts/nbsrc[5](https://github.com/mwouts/jupytext/issues/5))
- When a file with an extension not associated to 'ipynb' is opened and saved, no 'ipynb' file is created (mwouts/nbsrc[5](https://github.com/mwouts/jupytext/issues/5))
- Extensions can now be a sequence of groups. For instance, `nbrmd_formats="ipynb,nb.py;script.ipynb,py"` will create an `ipynb` file when a `nb.py` is opened (and conversely), and a `script.ipynb` file when a `py` file is opened (mwouts/nbsrc[5](https://github.com/mwouts/jupytext/issues/5))
- `nbsrc` script was moved to the `nbrmd` package. The `nbsrc` package now only contains the documentation (mwouts/nbsrc[3](https://github.com/mwouts/jupytext/issues/3))