Changes 3/31/14

Ruby:

• Worked more on classes
• Learned about @@var class-wide variable, which stays constant across all instances
• Saw that there was a global variable $var, but couldn't figure out how to use it
• Learned about attr_accessor, attr_reader, and self.var
• Learned about custom setter methods with def var=(arg), which allows you to modify a value before setting it.  In java this was always annoying to deal with.