Merge pull request #23 from zqsd/develop

osg.performance.now fallback of performance.now because of firefox 10 used in enterprise
Merge pull request #24 from zqsd/develop

Using specific grunt uglify version.
- grunt v.04 migration. adds plato,
- fix json typo
- add jsvalidate missing task
- remove unnecessary project submoduling
Update README

- add release grunt parameter to build the whole thing.
Add support for crossOrigin option in readImage
Adjust behaviour of fetchImage because of the crossOrigin policy
Add a case to hangle safari without window.performance
adjust camera when initialized with no size
Merge branch 'develop' of https://github.com/cedricpinson/osgjs into develop

Conflicts:
	js/osgDB/Input.js