Refactor exported Avails object #5
Description
Currently there is a core Avails object that is exported as a module. Various methods are defined and implemented here.
We need to refactor this object so that the methods are individual functions defined in their own files. Then we need to assign these methods, and other methods we already have, to this object for export.
Since the word 'Avails' is included in these methods, it is best to remove them when they become methods on samed named object.