Updated -itemsIncludingAllDescendants, -itemsIncludingAllRelatedDescendants,  -itemAtPath to use FOREACH. Reformatted the documentation of these methods. Also made some minor adjustments to -itemAtPath:.
Updated -itemsIncludingAllDescendants, -itemsIncludingAllRelatedDescendants, 
-itemAtPath to use FOREACH. Reformatted the documentation of these methods.
Also made some minor adjustments to -itemAtPath:.

git-svn-id: 0833b781a6984bca00fd44c5b8a33a6c879c84c9@4360 7b3f36aa-e6db-49c1-8b4c-66eac1997e64

etoile/EtoileUI,etoile/EtoileUI