* get_many_strings() now return an ordered dict which can be indexed

[royqh1979]

now we can:

values=easy.get_many_strings("please input:", labels=('a=','b=','c='))
a=values[0]
b=values[1]
c=values[2]

as well as

a=values['a=']
b=values['b=']
c=values['c=']