Misc-Extensions 4.0.5

Just a few, ah, miscellaneous improvements:

• Result types max and min now have a :key parameter, allowing you to find the maximum or minimum by some property of the values rather than the values themselves. As a special case, if :second-value is supplied for this parameter, the second value of the mapped function is used.
• New result type product.
• New argument and result types hash-table.