Remove ArgumentListNode and ParameterListNode
Add more factory methods to Token
Change parseSnippet to return the first child in snippet
Update doc comment to reflect API change
Merge pull request #24 from grom358/commalist

Commalist
Fixed references to Token::string() to Token::identifier()
Added method to remove last item on CommaList
Merge branch 'master' of https://github.com/grom358/pharborist