Better support terminals behaving like urxvt (#101).

This terminal was allowing backspaces (\b) to bypass column zero on the
current row, completely breaking the current way gitinspector was
clearing text outputted to the currently active row.

gitinspector/terminal.py

@@ -77,7 +77,7 @@ def ioctl_get_window_size(file_descriptor):
 	return int(size[1]), int(size[0])
 
 def clear_row():
-	print("\b" * 200, end="")
+	print("\r", end="")
 
 def skip_escapes(skip):
 	if skip: