stderr isn't reset on exit

[cjerdonek]

colorama doesn't seem to reset stderr properly on program exit.

This resulted in the following pip issue: pypa/pip#6354
It causes the color to remain in the user's terminal.

It's possible this is caused by the fact that colorama's reset_all() which it calls on exit only resets orig_stdout and not orig_stderr, which is where the color is happening:

colorama/colorama/initialise.py

Lines 18 to 20 in d7a5382

	def reset_all():
	if AnsiToWin32 is not None: # Issue #74: objects might become None at exit
	AnsiToWin32(orig_stdout).reset_all()

See also the related issue #200.