Tweaks from using it

* percentage based values from an element
* throttle events using raf

Signed-off-by: Tim Smart <tim.smart@designworks.co.nz>
Bump version to 0.1.1

Signed-off-by: Tim Smart <tim.smart@designworks.co.nz>
Merge branch 'release/0.1.1'
Merge tag '0.1.1' into develop

Version 0.1.1