padding of recording ui buttons
filter observables when the application is off
onbeforeunload warning: closes #48
enhancement of beforeunload state and prevent duplicate shares
RotateTransform transforms per a center point
JXG.Transformation.prototype.applyOnce decorator: wontuse
auto-focus on query slider
add Mousetrap library
keyboard bindings for observable commands: closes #36
version 0.1.1
Merge branch 'staging'