Add etags to list (fetch) requests.
Move etags out of ret.data and up to ret.etags.
key etags with nkey, not pkey.
comment fix.
Add etag query debugging.
Set etags property on ret before data so format matches retrieveRecord().
Merge pull request #1327 from ssshyam/master

Updated Item Source Test
Merge pull request #1305 from bendiy/etags-on-lists

Add etags to list (fetch) requests.