prefix internal directive methods with $ so its less confusing
Use more robust string -> fragment conversion

Using the wrapper technique from jQuery so that
utils.toFragment() can deal with table elements
and SVG elements (with proper namespace)
emit only once in object.$add
fix #242 expressions with object literals
bring back the rAF
use fn.apply in external vm event methods
fix #247 native filters improperly being flagged as computed
Remove identifier sync back in v-repeat

The auto-sync back when an identifier is used causes issues
such as #213 and #234, while the feature is a rarely used
edge case that is also a bit magical. It can be easily circumvented
by using object arrays instead of primitive ones, and the sync-back
is better left in userland for those who really need it.

For reference, Angular also doesn't support sync back for primitive values.
Release-v0.10.4