Improve the instllation instructions

12 jobs for install in 29 minutes and 14 seconds (queued for 172 minutes and 23 seconds)
Status Job ID Name Coverage
  Build
passed #67837
conda-linux
build_linux_27

00:01:30

passed #67839
conda-linux
build_linux_35

00:01:37

passed #67841
conda-linux
build_linux_36

00:01:33

passed #67842
conda-macosx
build_macosx_27

00:02:51

passed #67840
conda-macosx
build_macosx_35

00:02:55

passed #67838
conda-macosx
build_macosx_36

00:02:40

 
  Test
passed #67847
conda-linux
test_linux_27

00:02:24

86.0%
passed #67845
conda-linux
test_linux_35

00:02:34

86.0%
passed #67843
conda-linux
test_linux_36

00:02:34

86.0%
passed #67844
conda-macosx
test_macosx_27

00:04:34

87.0%
passed #67846
conda-macosx
test_macosx_35

00:04:50

87.0%
passed #67848
conda-macosx
test_macosx_36

00:04:56

87.0%