added svelTraverse to lib; renamed old svelTraverse in helloworld to avoid conflicts
svelTraverse.py to lib
moved files around; todo: update lib/svelTraverse.py to actual grammar
added traverse methods to handle hello, world example
fixed output .py format
Merge pull request #8 from chrso/master

added svelTraverse to lib; renamed old svelTraverse in helloworld to avo...