surface_alt_text doesn't forward non-keyword arguments

[adamnovak]

surface_alt_text is meant to be a thin wrapper around add_alt_text now:

matplotalt/matplotalt/matplotalt.py

Lines 183 to 185 in 5db823d

	# for backwards compatability
	def surface_alt_text(**kwargs):
	add_alt_text(**kwargs)

But it only forwards keyword arguments, not positional arguments (*args). So if I call it like the documentation for 0.6 says:

surface_alt_text(sunshine_alt, methods=["html", "img_file"])

Then I get:

TypeError: surface_alt_text() takes 0 positional arguments but 1 was given

[KaiNylund]

Thank you for pointing that out! Addressed in aafca78