read_directory_changes: On directory create check if it may have been a move

On Windows if a folder is moved from outside the watched folder to inside it,
we only get a Directory Create from ReadDirectoryChangesW, no events for the directory's
children. Err on the side of caution and call them CreatedFile and DirEvents since we
can't be absolutely sure they came as the result of a move.
Merge pull request #154 from Ormod/read_dir

read_directory_changes: On directory create check if it's actually a mov...