Wrap window getDefaultComputedStyle

getDefaultComputedStyle is a Mozilla proprietary extension but
jQuery uses it so we have no choice but to support it.

Fixes https://github.com/Polymer/platform-dev/issues/32
Disable eval for Firefox OS Apps

Fixes #467
Merge pull request #473 from arv/firefox-os-apps-disable-eval

Disable eval for Firefox OS Apps
Filter wrapped NodeList contents from native NodeLists

Fixes #629
Merge pull request #474 from MediaMath/nativeQuery

Implement newly proposed DOM selection approach
Handle native querySelector returning nothing

	- Fixes #476
	- Added tests
Merge pull request #477 from MediaMath/nativeQuery

Handle native querySelector returning nothing
Account for DOM selection in sub-shadow elements

	- Fixes #480
Update README.md
Merge pull request #470 from arv/get-default-computed-style

Wrap window getDefaultComputedStyle
unwrap(FormData) fails
Allow :not() selector for the content select attribute

Fixes #485
Rename the .impl property and ensure all files use unwrap as needed
Added IE 10 support
Restore IE10 functionality.
Merge pull request #489 from sorvell/master

Restore IE10 functionality.
Merge pull request #391 from arv/no-impl

Rename the .impl property and ensure all files use unwrap as needed
Merge pull request #487 from kaapa-s/master

Added IE 10 support
update package.json
Merge pull request #486 from arv/content-not

Allow :not() selector for the content select attribute