Fixes placeholders occasionally not rendering

Swiping and causing many pages to scroll, and then moving the mouse
over the content while the content is scrolling would prevent
the placeholders for the new pages from rendering.

This occurred since mousemove events would be added to the
TransfomrationQueue after the dragend event. When the dragend event
was processed, the queue would not be empty, and so it would wait
to call ScrollList.render. When the mousemove events process they
do not trigger a render. So we'd end in a state where the
TransformationQueue was drained, but the placeholders in view would
not be rendered.

The solution is to ignore mousemove events while the Awesomemap is
being transformed. There should be no need to handle them at this
time anyway.
Remove comma
Move ignoring of mousemove to TransformationQueue.
Use Object.create to avoid modifying the prototype in spec
Do not add mousemove events to TransformationQueue.

Also, fix bug in TransformationQueue so that processing an empty
queue sets isProcessing to false. Previously, it would be left in a
processing state, and could not be restarted.
Remove inserted line in AwesomeMap
TransformationQueue should ignore all mousemove events
Merge pull request #87 from WebFilings/fix_placeholders_occasionally_not_rendering

Fixes placeholders occasionally not rendering