Add optional parameter to enable the use of feature flags
Bump minor version number to 1.3.0
encodeURIComponent on the feature name passed in
Construct client with an single object rather than parameters, and update package version to 2.0.0
Fix typo in readme
Merge pull request #5 from Financial-Times/feature-flags

Allow API Client to enable feature flags on the content API, and switch to passing configuration in a single argument as an object