Only unbind resize event if it was bound before.

In case options.isResizeBound is false and no resize handling should be done `destroy` event fail in IE8 due to not being able to detach event.
no need for defaultView.getComputedStyle

https://developer.mozilla.org/en-US/docs/Web/API/Window.getComputedStyle#defaultView
use constructor.defaults for default options

move off of prototype.options
add back prototype.settings

Fixes broken backwards compatibility with Packery >=v1.2.0
move notes; add changelog
change log
specify bower.json versions
add needsResizeLayout. Fixes #9
Merge branch 'master' of https://github.com/fedot/outlayer into fedot
add #5 bug fix to changelog
add isResizingContainer option and resizeContainer method
Fixes #7
require eventEmitter 4.2 for once, tick version