[photos] Assign the _loading ivar in setLoading:

Closes #343.
Merge pull request #342 from djMax/djMaxM_css_nirvana

Relative positioning, localized string support, and Chameleon updates for strings
Merge pull request #345 from djMax/djMaxM_css_nirvana

Fixed compiler errors on certain targets
[css] Shortcut for creating invocations from selectors on self
[css] Fixed bug where views without cssClass will not get registered with the DOM
[css] support for textured background colors from resource images
Merge branch 'master' of git://github.com/jverkoey/nimbus