devapp: allow plots of issues by release
devapp: allow plots of issues by release

Change-Id: Ief3aa379d2a535a3210b088a4841f1c88eadc641
Reviewed-on: https://go-review.googlesource.com/28974
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

golang/build,golang/build,golang/build,golang/build