Merge branch 'parallel_for' into 'master'

Add Parallel For.

See merge request !10
4 jobs from master in 3 minutes 53 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #3071
build_cmake

00:46

 
  Test
passed #3072
run_tests

00:43

 
  Sanitizer
passed #3074
run_address_sanitizer

01:25

passed #3073
run_thread_sanitizer

00:57