Moved constants to Constants.js. See #100
Use vars instead of instance variables.
Made instance variables lower case even though they are constants.
Used var instead of instance variables. See #100
Moved the require statements out.
Factored out cementWidth into a variable. Minor formatting update.
Minor refactor
Factored out cement width into a variable. Reformatted for better readability.
Refactored and reformatted for better readability
Made instance variables lower case even though they are constants. See #100
Use this instead of trapezoidPoolModel.
Replace calls to viewToModelX, Y with viewToModelPosition