added createStore.js

Change-Id: I226cd45efb4f7d63beb21aeaa2197eac4c9860c4
Reviewed-on: https://gerrit.instructure.com/43836
Reviewed-by: Eric Berry <ericb@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Ryan Florence <ryanf@instructure.com>
Product-Review: Ryan Florence <ryanf@instructure.com>