Minor scope change
added onblock event listener
added single datatype test
added app description
added DBValidate.js
added code comments
this version works. More scope changes
Added DBValidate
made store a var. Removed reference to this.
replaced multiple xhr get functions with one
changed method name
usedSpace now checks data type
Slight change to init error message handling
switched unload event
create a shim init event
changed property for capturing indexeddb  error msg
Switched to listen for IndexedDBShimInit
added ability to capture performance metrics