Clarify that excluded financial interests are bound to "company, partnership, or fund"

[zenzen-sol]

This PR attempts to clarify that the examples of financial interests are not meant to exclude any of the enumerated examples from the definition of Token, except as they relate to a "company, partnership, or fund".

Although I happen to agree with the issues raised in #4 and #12, I've left "fund" in this PR for now.