comments for todomvc example
remove trailing comma in observer.js
bindings that are not found are now created on current compiler instead of root
clean up get binding owner compiler logic
should lock during composition in all cases
isSimple -> isEmpty
update() is now optional when creating a directive
commits example
Minor refactors

- update Firebase example lib version
- depsParser now depends on Observer instead of the other way around
- transition classes should not be cached
update commits example
simplify binding mechanism, remove refresh()
do not modify original computed property getter/setters
separate computed properties into `computed` option
unit tests pass for computed property rewrite
refactor Compiler.createBinding
Release-v0.8.0