upgrading metrics
Support flag toggling
tidy up usage of feature-flags-client
Merge pull request #91 from Financial-Times/integrate-toggler

Support flag toggling
Update package.json
Update uk-front.js
Merge branch 'master' of https://github.com/Financial-Times/next-engels into bugfix

* 'master' of https://github.com/Financial-Times/next-engels:
  Update uk-front.js
  Update package.json
  tidy up usage of feature-flags-client
  Support flag toggling
  upgrading metrics

Conflicts:
	package.json