Development Guide (Good practice for error handling)

[nilshempelmann]

include some examples of how to handle log infromation

https://birdhouse.readthedocs.io/en/latest/dev_guide.html#writing-functions

[nilshempelmann]

@stephank16 Here we can include a section about "Version indicators"

Something like:

• Full version (v1.0) with scientific publication in a reviewed journal
• subversion v.1.1 by major changes
• subsub verions v.1.1.1 by minor changes
• patch v1.1.1_patch1 bugfix

[nilshempelmann]

@Zeitsperre I wrote to a chapter about Process, Functions and Error handling: https://birdhouse.readthedocs.io/en/latest/dev_guide.html#writing-a-wps-process

I leave it to you (and others) make modifications and close this issue.

[cehbrecht]

@nilshempelmann looks good :)