Reload affected modules before calling detect_macros

Resolves #2. Allows us to use a stock MacroPy.

imacropy/iconsole.py

@@ -49,6 +49,8 @@
 from macropy import __version__ as macropy_version
 from macropy.core.macros import ModuleExpansionContext, detect_macros
 
+from .util import reload_macro_modules
+
 _placeholder = "<interactive input>"
 _instance = None
 
@@ -78,6 +80,7 @@ def __init__(self, extension_instance, *args, **kwargs):
 
     def visit(self, tree):
         try:
+            reload_macro_modules(tree, '__main__')
             bindings = detect_macros(tree, '__main__')  # macro imports
             if bindings:
                 self.ext.macro_bindings_changed = True