Resolve conflicts with layout props

[ssomnoremac]

I was completely unaware that you could set layout props directly on the component instead of in style

<View backgroundColor="red"/>

is the same as:

<View styles={{backgroundColor: "red"}}/>

at least as far as I can tell. So margin={0} is already implemented and this library doesn't need to address that. But what's interesting is this fails:

position={[23,13]} 

but

margin={[34,23]} 

does not. I'm going to look at why, because I think I had position working at one point. Are there any other conflicts we should worry about?

[ssomnoremac]

looks like flex is actually accounted for completely. Somehow the flex boolean works. A true is interpreted as flex:1 so I've removed flex completely from this library. As for position, I'm just going to go with pos for now.

[eightyfive]

Just a note to mention that Layout props cannot be set on react-native-web View component.

And according to the creator:

... this was an early accident in React Native.

necolas/react-native-web#914