Add john resig's simple inheritance code

From http://ejohn.org/blog/simple-javascript-inheritance/
RequireJS'ify Resig's class library
Use app/class for inheritance

Use jresig's inheritance code for class definition and inheritance
instead of roll-our-own.  Should be otherwise the same but the code
looks less boilerplatey.
Use app/class for inheritance
Add View base class

Move some common functionality from view code into a View base class.
Right now the base class offers compiling View templates.
Remove unnecessary .each
Inherit WorkoutView from View