v0.2.2  --  2014.04.18
- Do not rely on es5-ext's valid-callable. Replace it with simple internal function
- In MutationObserver fallback rely on text node instead of attribute and assure
  mutation event is invoked by real change of data

v0.2.1  --  2014.02.24
- Fix case in import path

v0.2.0  --  2014.02.24
- Assure microtask resultion if MutationObserver is available (thanks @Raynos) #1
- Unify validation of callback. TypeError is throw for any non callable input
- Move main module from `lib` to root directory
- Improve documentation
- Remove Makefile (it's environment agnostic pacakge)

v0.1.0  --  2012.08.29
Initial
