finalize 0.9.0 release

- update CHANGES
- removed @ for handles in AUTHORS for uniform appearance

AUTHORS

@@ -42,4 +42,4 @@ their first commit. GitHub handle is optional.
 2023
 ----
 
-- Alexander Moriarty (@a-ws-m)
+- Alexander Moriarty (a-ws-m)

CHANGES

@@ -5,7 +5,7 @@ CHANGES for MDPOW
 Add summary of changes for each release. Use ISO 8061 dates. Reference
 GitHub issues numbers and PR numbers.
 
-2024-??-??    0.9.0
+2024-10-10    0.9.0
 cadeduckworth, orbeckst, VOD555, a-ws-m
 
 Changes
@@ -30,16 +30,21 @@ Changes
 * internal log_banner() now uses logger as argument (PR #247)
 * use `black` formatter for codebase (#271)
 * implemented `forcefields.Forcefield` class (#267)
-  - facilitates users using non-default forcefields without changing package code
+  - facilitates users using non-default forcefields without changing package
+    code  
   - `equil.Simulation` has new `ff_class` argument
-  - each `Forcefield` has unique `default_water_model`, replacing global `DEFAULT_WATER_MODEL`
-  - `get_solvent_model()` and `get_solvent_identifier()` take either `str` or `Forcefield` type for the `forcefield` argument
-  - both functions also use the `Forcefield`-specific `default_water_model` (fixes #112)
+  - each `Forcefield` has unique `default_water_model`, replacing global
+    `DEFAULT_WATER_MODEL`
+  - `get_solvent_model()` and `get_solvent_identifier()` take either `str` or
+    `Forcefield` type for the `forcefield` argument    
+  - both functions also use the `Forcefield`-specific `default_water_model`
+    (fixes #112)  
 * `forcefields.DEFAULT_WATER_MODEL` removed (#267)
-* changed `system.top` and `system_octwet.top` to act as templates and added `.template` suffix (#267)
+* changed `system.top` and `system_octwet.top` to act as templates and added
+  `.template` suffix (#267)  
 * removed `forcefields.get_ff_paths()` (#267)
-* changed `forcefields.get_solvent_identifier()`: will raise `ValueError` instead of returning `None` (#267)
-
+* changed `forcefields.get_solvent_identifier()`: will raise `ValueError`
+  instead of returning `None` (#267)
 
 Enhancements