DynamoPaths packages into roaming appdata.
Drop "dynamo" from packages subdirectory name.
Retarget packageloader at DynamoPaths.Packages
Update package download folder path.
Update sample tests packages path.
Ensure path setup before controller construction.
Added test case for defect MAGN-3648
Remove dead code in core
Merge pull request #1787 from DynamoDS/PackagesDirectory

Packages Directory
Move definitions folder to appdata.

Refactor resolution of Dynamo's appdata folder into a separate method.
Remove a dead comment.
Construct CustomNodeManager with definitions path.
Create definitions and packages if they don't exist.
Update default save directory reference.
Merge pull request #1791 from DynamoDS/DefinitionsFolder

Definitions Folder
Don't overwrite member collections in path setup.
Add extra resolve paths before calling setup.
Fix 2015 copy step.
New ASM installer.
Trim ASM installer. Reverse load path ordering.