Add main.js exporting the API functions for bundle

Adding a new main JS-file, which only exports the API-functions from the
different source files, so that they can be bundled as a standalone
build.

package.json

@@ -3,7 +3,7 @@
   "version": "0.2.0-SNAPSHOT",
   "description": "JavaScript library to covert geo-features encoded in 'HERE JSON' to GeoJSON",
   "scripts": {
-    "dist": "node ./node_modules/mkdirp/bin/cmd.js dist && browserify -g [ babelify --plugins [  transform-es2015-modules-commonjs ] ] -p [ standalonify --name hj2gj --deps [ null ] ] -g [ bubleify ] src/** > dist/hj2gj.js",
+    "dist": "node ./node_modules/mkdirp/bin/cmd.js dist && browserify -g [ babelify --plugins [  transform-es2015-modules-commonjs ] ] -p [ standalonify --name hj2gj --deps [ null ] ] -g [ bubleify ] src/main.js > dist/hj2gj.js",
     "doc": "node ./node_modules/documentation/bin/documentation.js readme -s API src/{places.js,routing.js,traffic.js,weather.js} --shallow",
     "pretest": "eslint ../src & npm run test-bundle",
     "test": "mocha test/test-bundle.js",

src/main.js

@@ -0,0 +1,19 @@
+/*
+here-json2geojson - Convert HERE JSON to GeoJSON object
+Copyright 2017-present meggsimum
+License: https://github.com/meggsimum/here-json2geojson/blob/master/LICENSE
+*/
+// This only exports the API functions for the standalone build
+import {readIsolines, readRoute} from './routing.js';
+import {readTrafficIncidents} from './traffic.js';
+import {readWeatherConditions} from './weather.js';
+import {readPlaces} from './places.js';
+
+// comment out single unwanted functions for a smaller build
+export {
+    readIsolines,
+    readRoute,
+    readTrafficIncidents,
+    readWeatherConditions,
+    readPlaces
+};