skippy-xd animation

[felixfung]

Finally animation for expose :)

Added config option animationDuration (in milliseconds), 0 to switch off animations.

[dreamcat4]

thank you for your work, and for submitting this pr, i would like to try it out sometime soon, in next few days. it seems like a worthwhile feature

in the meantime if you would like to speed up this process then feel free to resolve the 2 minor outstanding actions:

• resolve 1 minor merge conflict in git
• append to the end of new config line # 0 to switch off

animationDuration = 200 # set = 0 to switch off animations

otherwise i can do those minor in 2-3 days time, it seems like a clean merge to master branch

[felixfung]

Animation is exposing that the original and final window positions are not optimally arranged, i.e. the windows are not moving to their closest slots. This makes usage not the most intuitive and efficient. Will be looking into it.