adding missing grid image referenced in demo css
dropping deprecated window.webkitStorageInfo in favor of navigator.webkitTemporaryStorage
Merge branch 'feature/webkitTemporaryStorage' into dev
Revert "adding an option for an error element to drop error messages into--and handling case of rate limit error from github by dropping it into the error element (if exists) or alerting if no error_el is supplied. Using bootstrap in the demos to create an error alert banner."

This reverts commit 50c49194df57e78b393e06af4a822b1973422df4.
Revert "dropping deprecated window.webkitStorageInfo in favor of navigator.webkitTemporaryStorage"

This reverts commit c2389dd656ccffd159e7b0c13ce1c9bed472e149.
Merge branch 'dev'