feat(core.string) Added startsWith() function.
feat(core.object) Added method override() utility.
refactor(graphs.graph) Removed redundant methods from graph API. Implmeented destroy().
feat(graphs.graphBuilder) Added graph builder to simplify API and redundtant component() calls.
docs(examples) Updated examples to use graphBuilder, plus minor cleanup.
chore(build) Try to get non-phantom browser to run on TravisCI.
chore(build) RequireJS config in bower was wrong/old.
Merge pull request #63 from racker/stack-wrapper

Simplify API.