Treat a blank Stripe key the same as a missing one (#352)
Treat a blank Stripe key the same as a missing one (#352)

Makes CloudFormation config easier: we can set the env var unconditionally, but leave it blank for team instances.
quiltdata/quilt,quiltdata/quilt-compiler,quiltdata/quilt,quiltdata/quilt,quiltdata/quilt-compiler,quiltdata/quilt-compiler,quiltdata/quilt,quiltdata/quilt-compiler,quiltdata/quilt