fixing LinkedList
Merge branch 'master' of https://github.com/corinnelhh/data-structures
fixed LinkedList
Merge branch 'master' of https://github.com/corinnelhh/data-structures
merged test linkedlist
Merge pull request #1 from corinnelhh/ProperParens

first commit of proper parens
added and tested making LinkedList iterable
Update README.md
fixed toString() format
Merge branches 'master' and 'Stack' into Stack
fixed Node