Added some properties and example individuals
Added bevon:manufacturer property
Added classes for Porter, Stout, and Dry Stout
Added two new properties

Added two new properties: bevon:base, which is a sub property of gr:isVariantOf, and bevon:variant, which is an inverse property of bevon:base
Changed the semantics of some of the properties including bevon:container and added a few container instances
Added classes and properties related to fermentation bases and breweries
Added a class and a few properties to describe aging process
Added a class and a property: bevon:Distillery and bevon:distillery
Bumped to version 0.4