Add synonyms/xrefs to ZECO radiation branch based on FB terms

[sjm41]

The following radiation terms from FBcv are already in ZECO, and should have FB synonyms/xrefs added accordingly:

gamma ray (ZECO_0000216)

• add xref to FBcv:0000506 (https://flybase.org/cgi-bin/cvreport.pl?cvterm=FBcv:0000506, http://purl.obolibrary.org/obo/FBcv_0000506)

radio waves (ZECO_0000210)

• add xref to FBcv:0000521 (https://flybase.org/cgi-bin/cvreport.pl?cvterm=FBcv:0000521, http://purl.obolibrary.org/obo/FBcv_0000521)

ultraviolet light (ZECO_0000214)

• add synonym "U.V."
• add xref to FBcv:0000524 (https://flybase.org/cgi-bin/cvreport.pl?cvterm=FBcv:0000524, http://purl.obolibrary.org/obo/FBcv_0000524)

x-ray (ZECO_0000215)

• add synonym "X ray"
• add xref to FBcv:0000518 (https://flybase.org/cgi-bin/cvreport.pl?cvterm=FBcv:0000518, http://purl.obolibrary.org/obo/FBcv_0000518)

alpha particle (ZECO_0000221)

• add synonym "alpha ray"
• add xref to FBcv:0000505 (https://flybase.org/cgi-bin/cvreport.pl?cvterm=FBcv:0000505, http://purl.obolibrary.org/obo/FBcv_0000505)

neutron (ZECO_0000219)

• add xref to FBcv:0000516 (https://flybase.org/cgi-bin/cvreport.pl?cvterm=FBcv:0000516, http://purl.obolibrary.org/obo/FBcv_0000516)

[sjm41]

Won't fix - plan to use ENVO/CHEBI as sources for radiation mutagen term within Alliance rather than ZECO.