can we agree to put more white space into our code?

I follow there rules for specs:

- 1 blank line between sections of nontrivial it block
- 2 blank lines between it blocks
- 2 blank lines between describe blocks
- 2 blank lines between beforeEach and afterEach
- no blank line between describe and the first child it
- no blank lines between two or more closing }); lines

tests cover:
- creating comment tags from a string
- creating script tag from a string
- wrapping document fragment

this is needed to be compatible with jqQuery 1.5.1

our original implementation doesn't work with
document fragments on IE

- tests were added to cover missing cases

the original implementation returned incorrect value value for
objects with 'length' property.

- extend size() to take size(obj, ownPropsOnly)
- add specs for size()
- update docs to mention string support
- use size() in ng:repeat

including the hasOwnProp check for all object doesn't create
significant perf penalty:
http://jsperf.com/dedicated-code-branch-for-hasownprop

- add `sync` flag xhr.cache
- change ng:include to use the sync flag
- change ng:view to use the sync flag

The end result is that there are fewer repaints in the browser,
which means less "blinking" that user sees.

If the server provides response with no body to a resource request,
resource should not mutate the resource model in the callback.