DynamoDS/Dynamo — pull request #1201 by Benglin (2014-03-03 09:49:08+00:00)
Title: Fixed migration methods for "StringFilename" and "StringDirectory" nodes

Previously as ```Dynamo.Nodes.StringFilename``` and ```StringDirectory``` nodes were migrated, their child element ```System.String``` is dropped. This commit fixes the problem where this string value gets migrated over to the newly cloned node, updating its ```InnerText``` property (the new node does not make use of attribute).