Docs: Added notes on how to use pbjs and pbts programmatically

Author: dcodeIO

README.md

@@ -313,7 +313,7 @@ Documentation
 
 * [Google's Developer Guide](https://developers.google.com/protocol-buffers/docs/overview)
 
-* [protobuf.js API Documentation](http://dcode.io/protobuf.js/)
+* [protobuf.js API Documentation](http://dcode.io/protobuf.js/) and [CHANGELOG](https://github.com/dcodeIO/protobuf.js/blob/master/CHANGELOG.md)
 
 * [Questions and answers on StackOverflow](http://stackoverflow.com/questions/tagged/protobuf.js)
 
@@ -396,6 +396,20 @@ Generates TypeScript definitions from annotated JavaScript files.
 usage: pbts [options] file1.js file2.js ...
 ```
 
+### Using pbjs and pbts programmatically
+
+Both utilities can be used programmatically by providing command line arguments and a callback to their respective `main` functions:
+
+```js
+var pbjs = require("protobufjs/cli/pbjs");
+
+pbjs.main([ "--target", "json-module", "path/to/myproto.proto" ], function(err, output) {
+    if (err)
+        throw err;
+    // do something with output
+});
+```
+
 ### Descriptors vs. static modules
 
 While .proto and JSON files require the full library (about 17.5kb gzipped), pretty much all code but the relatively short descriptors is shared and all features including reflection and the parser are available.

dist/protobuf.js

@@ -37,7 +37,8 @@
     "types": "node bin/pbts --name protobufjs --out types/protobuf.js.d.ts src && tsc types/test.ts --lib es2015 --noEmit",
     "zuul": "zuul --ui tape --no-coverage --concurrency 4 -- tests/*.js",
     "zuul-local": "zuul --ui tape --concurrency 1 --local 8080 --disable-tunnel -- tests/*.js",
-    "make": "npm run lint && npm run test && npm run types && npm run build && npm run changelog"
+    "make": "npm run lint && npm run test && npm run types && npm run build",
+    "release": "npm run make && npm run changelog"
   },
   "dependencies": {
     "@protobufjs/aspromise": "^1.0.3",