Problem with individual_pixels set to True

[gamblor21]

If done with a tuple:

>>> mymap = PixelMap(pixels, (0,1,2,3,4,5), individual_pixels=True)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "adafruit_pixelmap.py", line 124, in __init__
TypeError: indices must be of type tuple

If done with a list:

>>> mymap = PixelMap(pixels, [0,1,2,3,4,5], individual_pixels=True)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "adafruit_pixelmap.py", line 112, in __init__
  File "adafruit_pixelmap.py", line 113, in <genexpr>
TypeError: 'int' object is not iterable

Looking I believe even after fixing the initial issue there is another error in _expand_ranges also when individual_pixels set.