bundle update
Update rails 4.1.4 -> 4.1.7
update bower assets (vue 0.10.5 -> 0.10.6)
Update minimum fluentd version for fix quote handling

See: https://github.com/fluent/fluentd/blob/master/ChangeLog
Merge pull request #94 from fluent/bundle_update

Update components and libraries (a.k.a. bundle update && bower update)