feat: follow Angular package format v4.0

Fixes #30

.gitignore

@@ -1,7 +1,7 @@
 # compiled output
-/bundles
-/lib
+/dist
 /test/build
+/out-tsc
 
 # dependencies
 /node_modules

cp-package.js

@@ -0,0 +1,23 @@
+const path = require('path');
+const fs = require('fs');
+
+const main = require('./package.json');
+
+const json = require(path.resolve(__dirname, process.argv[2]));
+
+const exclude = [
+  'devDependencies',
+  'scripts',
+  'config',
+  'private'
+];
+
+Object.keys(main).forEach(key => {
+  if (exclude.indexOf(key) === -1) {
+    if (!json[key]) {
+      json[key] = main[key];
+    }
+  }
+});
+
+fs.writeFileSync(path.resolve(__dirname, process.argv[3]), JSON.stringify(json, null, 2), 'utf8');