Packaging changes for 2.4.0 and changelog update

11 jobs for gracedb-2.4.0 in 8 minutes and 7 seconds (queued for 3 minutes and 40 seconds)
latest
Status Job ID Name Coverage
  Build
passed #429942
build:debian:jessie

00:04:07

passed #429943
build:debian:stretch

00:02:20

passed #429941
build:el7

00:01:36

passed #429940
build:tarball

00:00:27

 
  Test
passed #429949
docs

00:01:18

passed #429950
syntax

00:00:55

passed #429944
test:python2.7

00:01:18

passed #429945
test:python3.4

00:01:17

passed #429946
test:python3.5

00:00:55

passed #429947
test:python3.6

00:00:45

passed #429948
test:python3.7

00:00:48