adding second jsbin link
adding render and reposition test while scrolling
adding Ember.instrument to test performance; introducing enableProfiling function & Ember.ENABLE_PROFILING
one liner
renders & repositions for the list view
tests for positions and render using Ember.instrumentation
Merge branch 'master' of https://github.com/emberjs/list-view
Merge pull request #42 from twokul/master

Tests for render and position counts