gem changes:

install bundler-audit
update:
guard-sport to 1.5.0
i18n to 0.6.4
newrelic_rpm to 3.5.8.70
therubyracer to 0.11.4
tilt to 1.3.4
zurb-foundation to 4.0.2
apply foundation 4
gem update:

zurb-foundation to 4.0.3
Minor code formatting
add Home controller, with placeholder index page & basic spec