cleanup awcp package, version bump to 0.2.3

libs/awcp/README.md

@@ -1,3 +1,16 @@
-# awcp (package documentation)
+# awcp: Aepp-Waellet Communication Protocol.
 
-Please click the word "Documentation" in the sidebar
+Mostly an internal package.
+
+Page scripts (aepps) and wallet browser extensions (waellets) need to talk to
+each other.  This package contains
+
+1. type definitions of the messages
+2. a list of error codes
+
+[src/awcp.ts](./src/awcp.ts) contains a detailed explanation of how the
+protocol is structured.
+
+[Sidekick](../../sidekick/) exhibits how to use this from the perspective of
+the page script (aepp), and [Jack Russell](../../jrx) exhibits how to use this
+from the perspective of the waellet.

libs/awcp/jex.eterms

@@ -1,5 +1,5 @@
 {type, library}.
 {realm, local}.
 {name, awcp}.
-{version, "0.2.2"}.
+{version, "0.2.3"}.
 {deps, []}.

libs/awcp/src/awcp.ts

@@ -15,11 +15,12 @@
  * this.
  *
  * Keep in mind that these messages are not secret. Any browser extension or
- * foreign page script can intercept these messages.  Imagine as an (imperfect)
- * analogy that you work in an office.  Everyone's mail is dumped on the floor
- * in the middle of the office, and you are responsible for picking out which
- * letters are addressed to you.  Anyone else can pick up letters addressed to
- * you, and read them.
+ * foreign page script can intercept these messages, and inject messages of
+ * their own.  Imagine as an (imperfect) analogy that you work in an office.
+ * Everyone's mail is dumped on the floor in the middle of the office. You are
+ * responsible for picking out which letters are addressed to you.  Anyone else
+ * can pick up letters addressed to you, and read them.  Anyone else can also
+ * place their own letters in the pile.
  *
  * This module defines the shape of the messages that are sent. There are several
  * layers to the onion, each corresponding to natural branch points in the