Failing test case for MathML document scaling/formatting

See issue 192 (https://github.com/joseph/Monocle/issues/192)
Use constant for duration of animation
add gala reference to interaction model
prevent event propagation on scrubber interaction

When interacting with the scrubber and the scrubber was positioned over the book - the page turn event would fire as you interact with the book.

This issue can be viewed currently at http://test.monoclejs.com/test/controls/index.html
Merge pull request #195 from sguha00/speed_constant

`Monocle.Flippers.Scroller.speed` isn't used anywhere
Merge pull request #199 from lmvco/patch-2

Failing test case for MathML document scaling/formatting
Merge pull request #206 from danshultz/fix_test_interaction_model

add gala reference to interaction model
Merge pull request #207 from danshultz/scrubber_event_suppression

prevent event propagation on scrubber interaction
Fix global variable leaks and references.

This commit also removes duplicate var references. While duplicate var declarations are valid in non-strict mode, I tend to like to clean those up also.
ensure variables are all camel case - little OCD

found these when doing the global leak cleanup - figured while I was there, I would fix these for consistency.
add radix parameter to parseInt

While I'm not a huge fan of parseInt in most scenarios and prefer Number() over parseInt, I feel it's important to include the radix parameter because I've also run into subtle bugs of numbers being parse incorrectly due to radix being guessed at 2 or 8.

Not sure how you feel about this or how your preference stands but I feel it's more than dogma to ensure that the radix parameter is provided…but I also prefer to use Number() in most scenarios. :)

Let me know if this makes sense to pull in.
add jshint file

The jshint file is currently configured to based primarily on the practices of the code base.
Merge pull request #210 from danshultz/variable-name-consistency

ensure variables are all camel case - little OCD
Merge pull request #209 from danshultz/global-cleanup

Fix global variable leaks and references.
Merge pull request #211 from danshultz/parseInt-radix

add radix parameter to parseInt
Support a variance for basic onTap detection

Some devices are not tolerant of fat finger touches and will issue a move event in between a down/start and up/end event. This causes "onTap" to not perform well in some scenarios.

Supporting a tolerance for what constitutes as a "tap" provides the a fill gap for devices that issue erroneous events. This was mostly observed on the surface tablet and some instances of windows 8 touch devices.

The threshold can be adjusted by changing ```Gala.TAP_MAX_CONTACT_DISTNACE```.
Merge pull request #208 from danshultz/gala-event-rework-b

Support a variance for basic onTap detection
Merge pull request #213 from danshultz/include-jshint

add jshint file
Tidying.
Disambiguating some boolean comparsions at the suggestion of @danshultz.