Define all exported fields.
Define all exported fields.

For each field, the type and a short description is defined.
This is needed to generate the topbeat.template.json and the documentation.

wxdublin/topbeat,debadair/topbeat,andrewkroh/topbeat,andrewkroh/topbeat,ruflin/topbeat,wxdublin/topbeat,debadair/topbeat,ruflin/topbeat,yapdns/yapdnsbeat,monicasarbu/topbeat,monicasarbu/topbeat,yapdns/yapdnsbeat