feat(api): Export selected utility libraries via API

Allow implementing applications to use OTP-RR's distance/time conversions, etc.

Author: David Emory

lib/index.js

@@ -19,6 +19,18 @@ import { setAutoPlan } from './actions/config'
 
 import createOtpReducer from './reducers/create-otp-reducer'
 
+import * as distanceUtils from './util/distance'
+import * as itinUtils from './util/itinerary'
+import * as mapUtils from './util/map'
+import * as timeUtils from './util/time'
+
+const OtpUtils = {
+  distance: distanceUtils,
+  itinerary: itinUtils,
+  map: mapUtils,
+  time: timeUtils
+}
+
 export {
   // form components
   DateTimeSelector,
@@ -44,5 +56,8 @@ export {
   setAutoPlan,
 
   // redux utilities
-  createOtpReducer
+  createOtpReducer,
+
+  // general utilities
+  OtpUtils
 }