Feature Request: Add support for 'textAlign'

[EvilLooney]

I noticed we cannot use textAlign in styles since you are nesting <Text /> containers (https://facebook.github.io/react-native/docs/text.html#containers).

Would be nice if we could add support for this. Maybe with a <Text style={styles[node.name+'Align']}> class name (ie. pAlign)?

Thanks.

[osdio]

Sound good.
But these days, I am so busy, if you can open a PR, that will be good.