Changelog and upgrade guide changes

CHANGELOG.rst

@@ -3,18 +3,34 @@ Brewtils Changelog
 
 3.0.0
 -----
-Date: TBD
+Date: 11/10/20
+
+Note: This is a major upgrade with several breaking changes. Please see the
+`Upgrade Guide
+<https://github.com/beer-garden/brewtils/blob/master/UPGRADING.md>`_ for all changes.
 
-See the Upgrade Guide for upgrading from v2 to v3.
 
 New Features
 ^^^^^^^^^^^^
+- Plugins now automatically load configuration from CLI and environment variables
+- Logging configuration is loaded automatically when Plugins are created
+- No longer need to pass connection information to System/Easy/Rest Clients
+- Parameter choices definition can be a non-list iterable (beer-garden/#512)
+- It's now easier to specify an alternate parent when making a request (beer-garden/#336)
 - SchemaParser can now directly serialize dicts and Boxes (#239)
 
 Bug Fixes
 ^^^^^^^^^
+- EasyClient.get_instance_status is deprecated but now actually returns the instance status
 
-- Parameter choices definition can be a non-list iterable (beer-garden/#512)
+Other Changes
+^^^^^^^^^^^^^
+- Plugins are now multi-threaded by default (#47)
+- Better error messages when using SystemClient with raise_on_error=True (beer-garden/#689)
+- Various deprecated names have been removed
+- Can now defer setting a Plugin client
+- EasyClient.get_version returns actual version information instead of Response object
+- Using a pika version <1 is deprecated
 
 2.4.14
 ------

UPGRADING.md

@@ -262,8 +262,6 @@ The `Plugin.run()` method now raises a `brewtils.errors.RestConnectionError` if
 ### `SystemClient`
 
 #### Alternate Parent
-TODO - This is really a new feature, may not need to be in the Upgrade Guide.
-
 It's now easier to specify an alternate parent Request when using the `SystemClient`:
 
 ```python