Rename Node to RuleNode
Create clases for new AST model
TMP added empty test
TMP add empty visitor test
add SassSyntaxTree2
add notes
add SassSyntaxTreeBuilder
working?
Can handle nested trees
fluent builder and beginings of dumper
remove old copied code
Rename Build to ToTree
Remove Visit(RuleNode) from INodeVisitor
Remove debugging console.writelines
Dumper for the new AST model
Move INodeVisitor to its own file
move nodes to their own file
Create a new AstCompiler for the new AST
Don't emit empty rules
Convert SassCompiler to use new tree structure and make sure it still works,