Merge pull request #7 from zbartos/master

Todo app functionality enhanced so it's more like the official one
Fixes in media plugin. Example enhanced for input box so it could be tested with keyboard.
Small optimization.
Shorter and faster code for IE8.
new postInit component function, new b.preEnhance method, small changes
Allow to call b.init multiple times (mainly useful for tests)
Test of deref before rewrite
backpointer exchanged for recursive linear searching (hard to judge speed impact, but creating new nodes should be faster.
Nodes in cache has parent node pointer makes faster bubbling of events.
Todo example app

 - refactoring
Merge branch 'master' of https://github.com/Bobris/Bobril