[Gemfile] activesupport 4.0.0 has breaking changes for log subscribers
[Gemfile] activesupport 4.0.0 has breaking changes for log subscribers

jnunemaker/flipper,carlthuringer/flipper,alabeduarte/flipper,alabeduarte/flipper,jnunemaker/flipper,carlthuringer/flipper,alabeduarte/flipper,alabeduarte/flipper,gdavison/flipper,carlthuringer/flipper,gdavison/flipper,jnunemaker/flipper,carlthuringer/flipper,gdavison/flipper,gdavison/flipper,jnunemaker/flipper