fixed breaking change. Instantiating bootstrap now uses create()
correctly set _lastTileUrl. Deferred causes too much of a delay.
code comment to explain the hack.
input elements now terminated properly.
modified how min-level is calculated
minZoom, currentZoom, maxZoom now sync'd correctly
correctly terminate currentZoom input element
remove unused code
Merge pull request #201 from andygup/fix_tiled_sample

Fixes tiles-indexed-db sample