- clarified that composites are values created every time they are evaluated, removed corresponding TODO.
- clarified that composites are values created every time they
are evaluated, removed corresponding TODO.

R=r
DELTA=5  (3 added, 1 deleted, 1 changed)
OCL=17746
CL=17751

wesolows/golang-old,bdwalton/debian-golang,gnanderson/go,firebitsbr/golang-old,apparentlymart/golang,gnanderson/go,wesolows/golang-old,gnanderson/go,firebitsbr/golang-old,pombredanne/go-deleteme,tianon/debian-golang,bdwalton/debian-golang,gnanderson/go,bdwalton/debian-golang,h8liu/golang,wesolows/golang,apparentlymart/golang,wesolows/golang,tianon/debian-golang,ssrl/go,firebitsbr/golang-old,gnanderson/go,dsriram/golang,pombredanne/go-deleteme,firebitsbr/golang-old,wesolows/golang-old,dsriram/golang,h8liu/golang,tv42/old-go,tianon/debian-golang,firebitsbr/golang-old,tianon/debian-golang,apparentlymart/golang,ssrl/go,wesolows/golang,dsriram/golang,nightlyone/golang,nightlyone/golang,bdwalton/debian-golang,nightlyone/golang,nightlyone/golang,gnanderson/go,pombredanne/go-deleteme,tianon/debian-golang,pombredanne/go-deleteme,wesolows/golang,bdwalton/debian-golang,apparentlymart/golang,ssrl/go,dsriram/golang,nightlyone/golang,nightlyone/golang,tianon/debian-golang,gnanderson/go,tv42/old-go,bdwalton/debian-golang,wesolows/golang-old,pombredanne/go-deleteme,ssrl/go,wesolows/golang-old,wesolows/golang-old,pombredanne/go-deleteme,wesolows/golang,ssrl/go,h8liu/golang,apparentlymart/golang,apparentlymart/golang,h8liu/golang,dsriram/golang,tianon/debian-golang,tv42/old-go,firebitsbr/golang-old,wesolows/golang,tv42/old-go,tv42/old-go,h8liu/golang,h8liu/golang,apparentlymart/golang,tv42/old-go,wesolows/golang-old,ssrl/go,nightlyone/golang,bdwalton/debian-golang,tv42/old-go,tianon/debian-golang,h8liu/golang,pombredanne/go-deleteme,wesolows/golang,dsriram/golang,dsriram/golang,firebitsbr/golang-old,ssrl/go,firebitsbr/golang-old,bdwalton/debian-golang