Merge branch 'improve_perf' into 'master'

Improve build performance by removing installation steps

See merge request !14
5 jobs for master in 48 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
canceled #4562
test diaspora

00:00:48

canceled #4563
test ganggo

00:00:47

canceled #4564
test socialhome

00:00:47

canceled #4565
test testproject

00:00:46

 
  Deploy
canceled #4566
pages