updated H&D documentation
updated H&D documentation

jheusser/csvfix,mattgascoigne/csvfix,mcenirm/csvfix,ausonweng/csvfix,ausonweng/csvfix,mattgascoigne/csvfix,mattgascoigne/csvfix,ausonweng/csvfix,jheusser/csvfix,jheusser/csvfix,mcenirm/csvfix,mcenirm/csvfix