Python Funct class representing svel's funct

contains the assert method (called _assert())

assert() : creates new Svel Java file with extracted
method to test, compiles the file, and runs it to test
the given the input and output

(refactored old jextractor.py methods, deleted jextractor)
update Makefile to remove Java class files, removed binarys
Merge pull request #11 from emilyhsia/master

Python Funct class representing svel's funct