Add true bastard swords

[Fritz1776]

Basically one handed blades that can be wielded with two, as opposed to only having two handed blades that can be used with one. There are one handed swords and grips that are called 'bastard' implying this capability, but it isn't present. Additionally tier 5 and 6 swords are all one or two handed only, which makes this feature obsolete in the mid to late game, especially for crafted weapons. Honestly this should probably be possible with most weapons, since outside of rapiers, sideswords, etc there isn't any real reason why you can't just grip the pommel, and those weapons aren't present in the game.