Fixed a few scrolling related bugs:

* When a new message comes in, when a user is at scrollbottom, he will
no longer loose his scroll position.

* When new DOM elements are added on top, and the user scrolls down, the
extra white space is no longer appended.
Fixed some scroll related bugs.
Disabling localstorage load temporarily.
Merge branch 'master' of http://github.com/scrollback/scrollback

Conflicts:
	public/sdk/viewcontroller.js