Provide an API to dart:developer to control the web server hosting the Service Protocol

CHANGELOG.md

Index: CHANGELOG.md
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@@ -4,6 +4,35 @@
 
 * Allow `=` as well as `:` as separator for named parameter default values.
 
+### Service protocol changes
+
+* Accessing the service protocol now requires a randomly generated path
+prefix to be used. This path prefix can be scraped from standard output
+like the hostname and port are today.
+
+```
+Old base url:
+
+Observatory listening on http://127.0.0.1:54804/
+
+New base url:
+
+Observatory listening on http://127.0.0.1:54804/<token>/
+
+For example:
+
+Observatory listening on http://127.0.0.1:54804/PTwjm8Ii8qg=/
+
+To connect over WebSocket you would use the following URI:
+
+ws://127.0.0.1:54804/PTwjm8Ii8qg=/ws
+```
+
+### Core library changes

[kevmoo, 2016/10/20 17:21:55]

Forgive me – put this section up below Language. Thanks

[Cutch, 2016/10/20 23:31:51]

Done.

+
+* `dart:developer`
+  * The service protocol http server can now be controlled from Dart code.
+
 ## 1.20.1 - 2016-10-13
 
 Patch release, resolves one issue: