Talked about training data in documentation

Status Job ID Name Coverage
  Build
passed #66120
conda-linux
build_linux_27

00:04:09

passed #66122
conda-linux
build_linux_34

00:04:59

passed #66124
conda-linux
build_linux_35

00:04:03

passed #66125
conda-macosx
build_macosx_27

00:03:46

passed #66123
conda-macosx
build_macosx_34

00:04:25

passed #66121
conda-macosx
build_macosx_35

00:03:45

 
  Test
passed #66130
conda-linux
test_linux_27

00:03:41

86.0%
passed #66128
conda-linux
test_linux_34

00:04:51

88.0%
passed #66126
conda-linux
test_linux_35

00:04:27

86.0%
passed #66127
conda-macosx
test_macosx_27

00:05:41

87.0%
passed #66129
conda-macosx
test_macosx_34

00:06:02

88.0%
passed #66131
conda-macosx
test_macosx_35

00:05:46

87.0%