Fixed issue causing build to fail
Changed some naming in the Scheme.rkt file.
Change the capitalization of some parameter names in Scheme.rkt, because it caused IronScheme to fail, where DrRacket did not.
Added a project "CthConsoleTest" with examples of how to invoke all the different procedures in Scheme.rkt
Commented a test in Scheme.rkt
Removed func-lib.ss file.
Changed interface of FunctionPlotter.
Changed Intervals in Scheme.rkt to return inexact numbers instead of fractions.
Changed interface for FunctionPlotter to accept floating point values as start and end coordinates.
Changed SchemeGraph to display the function inserted.