Put a dot between the prefix and the date.
Move button disable after controller construction.
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.
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
Merge remote-tracking branch 'origin/master' into Revit2015

Conflicts:
	test/Libraries/Revit/DynamoRevitTests/DynamoRevitTests.cs