Update the readme to explain the added C++ source file inclusion.

Author: BartHertog

README.md

@@ -27,6 +27,11 @@ This document details the following:
 
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+## 4.0.0
+* TODO Installation via pip3: `pip install EmbeddedProto`. This will also install a matching version of protoc. So you do not need to install the protoc compiler yourself.
+* TODO Run EmbeddedProto as an executable: `embeddedproto -I YOUR_FOLDER YOUR_PROTO_FILE.proto`
+* Included the C++ source files in the python package. You can get the location of these C++ source files by running: `embeddedproto --cpp-src-location`.
+
 ## 3.6.0
 * Update to Protobuf version 32.0.
 * Increated the minimum python version to 3.10.