add speed slider and pause
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Merge pull request #241 from code-dot-org/webapp_speed_slider_and_pause

add speed slider and pause
jshint fix
Merge pull request #243 from code-dot-org/webapp_speed_slider_and_pause

jshint fix
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commit 44e829216f98d387253da1cc4e560186e0c6a73c
Merge: f67ed82 2942905
Author: cpirich <chris@code.org>
Date:   Wed Oct 22 20:37:18 2014 -0700

    Merge pull request #243 from code-dot-org/webapp_speed_slider_and_pause

    jshint fix

commit 29429056b49fc8d4832e011558d6140e76df2910
Author: cpirich <chris@code.org>
Date:   Wed Oct 22 20:35:38 2014 -0700

    jshint fix
Merge remote-tracking branch 'refs/remotes/origin/staging' into staging