Options and Affordances V1

First (primitive) iteration of the notion of options in recipes as well
as a very simplistic approach to a “by ingredient attribute” affordance.
Attributes and Parser

Added the parser class that parses the Attributes.txt file
Merge branch 'Knowledgebase' of https://github.com/kofarrell/baking into kofarrell-Knowledgebase

Conflicts:
	src/edu/brown/cs/h2r/baking/Experiments/ExperimentHelper.java
Merge branch 'kofarrell-Knowledgebase' into Knowledgebase