Added support for overriding the simple-rename action via envvar.

booty.py

 
     return { 'src': fpath, 'action': action, 'medianame': mname }
 
+def get_simple_rename_action():
+    if 'BOOTY_SIMPLE_RENAME_ACTION' in os.environ:
+        return os.environ['BOOTY_SIMPLE_RENAME_ACTION']
+    else:
+        return cfg['simpleaction']
+
 # Now go over all of the input files and figure out what to do with them.
 sources = []
 rarregex = re.compile('\\.r[0-9][0-9]')
 
     name, ext = os.path.splitext(f)
     if ext in video_exts:
-        sources.append(gen_title_action(f, cfg['simpleaction']))
+        sources.append(gen_title_action(f, get_simple_rename_action()))
     elif ext == '.rar':
 
         # RARs are a little more complicated to handle.