[yt-dev] Issue #1315: Place for domain-specific fields in the field documentation (yt_analysis/yt)

New issue 1315: Place for domain-specific fields in the field documentation https://bitbucket.org/yt_analysis/yt/issues/1315/place-for-domain-specific-f... Nathan Goldbaum: Right now most of this sort of documentation lives in the analysis modules. We'd like to split off most of the analysis modules into their own packages but one or two will stay in the main yt package because all they do is add a few fields. We should move the documentation for these analysis modules into the field documentation.