Non-string environment variables cause crash.

[isTravis]

This was first mentioned in #25, but that original issue had been resolved, so I am repeated this related, but separate issue here.

Thanks to @stevemorad for pointing out that environment variables can be used to set Thumbor conf values. I found that this works for string values, but not for int values, e.g. QUALITY.

I get an error when I set an environment variable with key QUALITY and value 95.

Here is the error I'm receiving.

And here is where the error originates from in PIL

Any suggestions on how to work around this? Or do I have to just manually set the value in thumbor.conf as you describe above?

[gsingh04]

To use integer values, you need to set it in thumbor.conf. It seems thumbor allow_environment_variables() is not able to handle int data types and hence the error. I would recommend opening the issue with thumbor.

[shsenior]

Version 3.0 resolves this issue.