Fixes jshint lint error message about redefinition

The reason jshint was saying "Redefinition of 'Event'" (lowercase too)
is because Event and event are reserved in javascript (mostly just in
the browser). Adding to .jshintrc's globals makes it recognized as a
global variable, just a fix really.
Merge branch 'master' of github.com:JohnBarton27/Tangible-Scheduler