Conflicting dependencies in bookshelf app

[zarandr]

pip gives me this error:

ERROR: Cannot install -r requirements.txt (line 5) and google-cloud-logging==2.4.0 because these package versions have conflicting dependencies.

The conflict is caused by:
The user requested google-cloud-logging==2.4.0
google-cloud-error-reporting 1.1.2 depends on google-cloud-logging<2.4 and >=1.14.0

To fix this you could try to:

1. loosen the range of package versions you've specified
2. remove package versions to allow pip attempt to solve the dependency conflict

ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/user_guide/#fixing-conflicting-dependencies

[dandhlee]

Thanks for bringing this up! #361 should fix this issue.