Master and Stack split management like in DWM & XMONAD.

What? A plugin that dynamically manages splits like in dynamic tiling window managers.

Why? Makes managing splits more intuitive in that:

1. Location of new splits is predictable and clear.
2. Moving around splits is easier.
3. Focusing on splits is easier.

Potential existing implementations: N/A

Potential pitfalls: Non that I am aware of.

[Edit] removed placeholders.