Don't falsly warn about empty result ranges with raw collation views.
Don't falsly warn about empty result ranges with raw collation views.

In the process of fixing 1228, couch_view:less_raw/2 and
couch_view:get_less_fun/1 are introduced to give access to the
respective data inside the couch_httpd_view  where the warning occurs
as well as couch_view_group where the actual view updating is defined.

Closes COUCHDB-1228.

git-svn-id: c1f8a8ec0b3bb2e99ab3413722f81f687760e79c@1149077 13f79535-47bb-0310-9956-ffa450edef68

apache/couchdb-futon,apache/couchdb-futon