Tag components with data-montage-le-component
Add _addTemplateObjects
Tag named and star argument nodes

Named arguments have a single attribute: data-montage-le-arg.
Star arguments are a range, the first element has the
data-montage-le-being attribute and the last element data-montage-le-end.
Add templateDocumentPart to iteration
Add parentDocumentPart to DocumentPart
Refactor debug tagging logic into functions
Rename MONTAGE_LE_FLAG to _montage_le_flag
Merge pull request #1431 from aadsm/le-debug

Add debug flag to provide more information about components when set