Lora support!

update readme to reflect some recent changes

modules/script_callbacks.py

@@ -73,6 +73,7 @@ callback_map = dict(
     callbacks_image_grid=[],
     callbacks_infotext_pasted=[],
     callbacks_script_unloaded=[],
+    callbacks_before_ui=[],
 )
 
 
@@ -189,6 +190,14 @@ def script_unloaded_callback():
             report_exception(c, 'script_unloaded')
 
 
+def before_ui_callback():
+    for c in reversed(callback_map['callbacks_before_ui']):
+        try:
+            c.callback()
+        except Exception:
+            report_exception(c, 'before_ui')
+
+
 def add_callback(callbacks, fun):
     stack = [x for x in inspect.stack() if x.filename != __file__]
     filename = stack[0].filename if len(stack) > 0 else 'unknown file'
@@ -313,3 +322,9 @@ def on_script_unloaded(callback):
     the script did should be reverted here"""
 
     add_callback(callback_map['callbacks_script_unloaded'], callback)
+
+
+def on_before_ui(callback):
+    """register a function to be called before the UI is created."""
+
+    add_callback(callback_map['callbacks_before_ui'], callback)