Created UseDeclarationNode::create(), but without passing tests (yet).
Created hasAlias() and setAlias() methods for UseDeclarationNode.
Small doc fixes.
setAlias() will now remove the alias if passed NULL.
Merged master
Updated doc of NewNode
Remove todo comment from setAlias
Merge pull request #145 from grom358/use_builders

UseDeclarationNode::has/setAlias