update changelog

CHANGES.txt

@@ -1,4 +1,33 @@
 
+0.3a24
+------
+
+- [feature] Added ``__eq__()`` and ``__ne__()`` methods to ``GPC`` class.
+
+- [general] Moved ``GPCType`` SQLAlchemy type class to ``rattail.db`` module.
+  This was necessary to make the ``GPC`` class more generally available to
+  callers who don't want or need SQLAlchemy to be installed.
+
+- [general] Moved enumerations from database extension to "core" ``enum``
+  module.  This is mostly for convenience to callers.
+
+- [bug] Fixed a few bugs with label batches.  These existed mostly because this
+  feature hasn't been used in production...
+
+- [feature] Added ``default_format`` attribute to ``LabelFormatter`` class.
+  Now when a label profile is edited, this default format is used if no format
+  is provided by the user.
+
+- [feature] Changed ``LabelProfile.get_formatter()`` method so that it assigns
+  the formatter's ``format`` attribute using the value from the profile.  The
+  formatter is free to use or ignore this value, at its discretion.
+
+- [feature] Improved the database synchronizer so that it is *somewhat*
+  tolerant of database server restarts.  This likely will need further
+  improvement as more testing is done.  The current implementation wraps the
+  entire sync loop in a ``try/catch`` block and when a disconnect is detected,
+  will wait 5 seconds before re-entering the loop and trying again.
+
 0.3a23
 ------