backend: dumber cache
backend: remove unused cacheItem type
backend: add cascading datastore cache
frontend: add static file serving
frontend: remove set -ex
frontend: remove set -ex from run
bump version to dev
remove -dev suffix to module
gcloud: filter appcfg output
Revert "backend: add cascading datastore cache"

This reverts commit 2700218da6730510d4666f4e84427d2833b7d393.
Merge pull request #16 from proppy/master

backend: dumber cache