Added a --simple-output option

This option turns off fancy output options like colors or progress bars.

Address #649

overviewer_core/logger.py

@@ -254,7 +254,7 @@ class ANSIColorFormatter(HighlightingFormatter):
             # No coloring if it's not to be highlighted or colored
             return logging.Formatter.format(self, record)
 
-def configure(loglevel=logging.INFO, verbose=False):
+def configure(loglevel=logging.INFO, verbose=False, simple=False):
     """Configures the root logger to our liking
 
     For a non-standard loglevel, pass in the level with which to configure the handler.
@@ -268,8 +268,10 @@ def configure(loglevel=logging.INFO, verbose=False):
     logger = logging.getLogger()
 
     outstream = sys.stdout
+    if simple:
+        formatter = DumbFormatter(verbose)
 
-    if platform.system() == 'Windows':
+    elif platform.system() == 'Windows':
         # Our custom output stream processor knows how to deal with select ANSI
         # color escape sequences
         outstream = WindowsOutputStream(outstream)