pirecorder: Controlled and automated image and video recording with the raspberry pi

A major release with, besides a number of fixes and improvements to the package, the publication of the accompanying paper in the Journal of Open Source Software.

Changes:

* Added statement to camconfig and documentation website regarding minimum
  recommended resolution
* Contribution statement added to README
* Included improved statement of need in JOSS paper and documentation
* Integrated ability to store ROI directly when running stream from the
  command line
* Added test.py file for testing all functionalities of pirecorder
* Improved paper in a number of ways
* Changed user settings to facilitate getting max resolution
* Fixed autoconfig stream not releasing camera after use
* Some final improvements to the paper for JOSS
* Small fixes
    - Added missing subdir to pirecorder settings documentation
    - Fixed delete parameter name in schedule documentation
    - Removed pandas as dependency of linked pythutils package
    - Fixed jekyll issue that prevented documentation website of not updating