Clarify the use of the term Parent and Parents throughout the rest section.

In part II, if you search on the word parent throughout the doc, you'll get a confusing variety of results.

1. In the resource table p13, it's defined as a Feed w/ the following for GET: getDocument-Parents or getFolder-Parents with returnToRoot
2. In the link table p15, the description is consistent, but under folder it says "(Parent Folder) Link is not available on root folder's or objects that do not have parents"
1. "Parent Folder" is singular, should it be plural? or would this be an Entry?
2. "folder's", is that possesive, if so confused, or plural...
3. for Type (Type of P) see issue 101.
3. p26 defines the method "getFolderParent" - should this be plural, a Feed?
1. is it assumed that folders can only have one direct parent and documents can have multiple?
4. p27 defined getObjectParents
1. p40 has <link rel="cmis:getdocumentparents" <- shouldn't that be cmis-parents?