Simplify correlated field model and fixups

A = a / (sqrt(sum(a**2)))

-->

A = sqrt(pspec / sqrt(sum(pspec)))
12 jobs for simplifymodel in 13 minutes and 20 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build Docker
passed #1111975
build_docker_from_cache

00:00:17

 
  Test
passed #1111977
test_mpi

00:00:20

passed #1111976
test_serial

00:05:18

86.0%
 
  Demo Runs
passed #1111984
run_bernoulli

00:00:31

passed #1111985
run_curve_fitting

00:00:29

passed #1111980
run_getting_started_1

00:00:34

passed #1111981
run_getting_started_2

00:01:01

passed #1111982
run_getting_started_3

00:02:13

passed #1111983
run_getting_started_mf

00:07:42

passed #1111978
run_ipynb0

00:01:37

passed #1111979
run_ipynb1

00:00:43

passed #1111986
run_visual_mgvi

00:01:30