Proj view

Hello,

The Commit 07d495e allow the projection defined in the view to be taken in account by re-creating a ol3.view object from non-default parameters. I wonder if the merge of the center and view directive can be usefull in order to not create two times the view object when the directive view is used. As the center attribute (lat, lon, zoom) are defined in the view in ol3.

Regards