Add debug AST visualization.
Add dot settings.

Adds a resharper settings file to be used by the team to ensure code
style compliance.
Code compliance.
Cleanup DynamoModel

Separate public and internal methods into regions that make it easier to
see just the public APIs.
Home space node map.

Create a node map that tracks the addition and deletion of nodes to the
home space.
Check on node map.

Don't add the nodes to the map if they are not home space nodes.
Merge pull request #1684 from DynamoDS/ASTDebugger

Add debug AST visualization.