making contributors file look nicer

[jachym]

Overview

Adds list of contributors to PyWPS

Related Issue / Discussion

#88

Additional Information

Contribution Agreement

(as per https://github.com/geopython/pywps/blob/master/CONTRIBUTING.rst#contributions-and-licensing)

• I'd like to contribute [feature X|bugfix Y|docs|something else] to PyWPS. I confirm that my contributions to PyWPS will be compatible with the PyWPS license guidelines at the time of contribution.
• [ẍ] I have already previously agreed to the PyWPS Contributions and Licensing Guidelines

[coveralls]

Coverage remained the same at 76.569% when pulling 38d7545 on jachym:84_contributors into 7c187fd on geopython:master.

[coveralls]

Coverage remained the same at 76.569% when pulling 38d7545 on jachym:84_contributors into 7c187fd on geopython:master.