Add OpenMP functions to documentation

6 jobs for master in 181 minutes and 2 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #2237
amd64
job_clang_amd64

03:01:01

passed #2241
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job_clang_amd64_nosh

03:00:31

passed #2239
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job_clang_py2_amd64

02:58:27

passed #2236
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job_gcc_amd64

02:17:16

passed #2240
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job_gcc_amd64_nosh

02:17:50

passed #2238
amd64
job_gcc_py2_amd64

02:15:53