Update to ext-js 3.4.0

Clean upgrade to 3.4.0 with no real changes involved. Replaced full
extjs install with a trimdown of only the essential. Moved from the
examples/ directory are ux/DataViewTransition.js and the fam icon set
Merge pull request #280 from mleinart/extjs_3_4

Update to ext-js 3.4.0