Paper2remarkable

* Add the option to not crop the file at all
([28](https://github.com/GjjvdBurg/paper2remarkable/pull/30)).
* Add the option to right-align the file so the menu doesn't overlap
([28](https://github.com/GjjvdBurg/paper2remarkable/pull/31)).
* Bugfix for validation for the JMLR provider

* Significantly speed up the program
([26](https://github.com/GjjvdBurg/paper2remarkable/issues/26))
* Add provider for JMLR
([28](https://github.com/GjjvdBurg/paper2remarkable/pull/28)).
* Bugfix for creating nested directories with ``-p`` option.

* Add provider for US National Bureau of Economic Research
([27](https://github.com/GjjvdBurg/paper2remarkable/pull/27)).
* Automatically extract the filename from a pdf url where possible
([25](https://github.com/GjjvdBurg/paper2remarkable/issues/25)).
* Speed up centering of pdfs by removing unnecessary cropping operation.
* Improve robustness against missing metadata, remove spaces in author names,
and other minor improvements.

* Automatically detect when a HTML source is provided
([24](https://github.com/GjjvdBurg/paper2remarkable/pull/24))

* Add support for articles from the web using the ``--html`` flag
([23](https://github.com/GjjvdBurg/paper2remarkable/pull/23))
* Add ``--version`` command to command line interface
* Fix cropping bug that resulted in occassional rotated pages

* Add support for older arXiv URL scheme