completed `scipy.io` #99

Job	Run time
lint-and-typecheck	28s
stubtest-all	55s
stubtest (scipy.cluster)	48s
stubtest (scipy.constants)	50s
stubtest (scipy.datasets)	48s
stubtest (scipy.fft)	47s
stubtest (scipy.fftpack)	44s
stubtest (scipy.integrate)	52s
stubtest (scipy.io)	47s
stubtest (scipy.linalg)	51s
stubtest (scipy.misc)	50s
stubtest (scipy.odr)	48s
stubtest (scipy.optimize)	44s
stubtest (scipy.special)	45s
stubtest (scipy.stats.contingency scipy.stats.distributions)	59s
stubtest (scipy.version)	43s
	12m 39s

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