wide_wraps(func, direction='down', input_num=1, to_kwargs={1: 'timeperiod'}, output_num=1) direction 机制有严重的bug

如果 func 输入多参数,其中一个数组参数 中间包含na , wide_wraps 会用push_na on this array only, it will cause the misalignment on all other parameter, 
for example correlation(a,b,10) , b has na , but A does NOT has na, after this wrap, the input on the corr by windows 10 will be misaligned. 