Photos API to access albums and photos

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Describe in detail the new feature you would like to see added
Similar to the features that the Picasa Web Albums Data API offers,
I want a new/modern API to access Google+ albums and photos, possible API 
methods include:

albums.list(userId) -> List all albums for a user.
photos.listByUser(userId) -> List all uploaded photos for user.
photos.listByAlbum(albumId) -> List all photos in the specified album.
photos.search(query) -> Find all photos matching the query.

If possible public results for unauthenticated requests, and results as defined 
by album visibility for authenticated requests.

The photo resource should contain all relevant information about the photo 
including exif information and location data if available, as well as number of 
views/+1's/comments. An additional comments.listByPhoto(photoId) to get 
comments on a photo would be nice as well, or the "activityId" of the Photo 
post that contains the comments included in the Photo resource, so that the 
already existing comments.list(activityId) method can be used.

Describe your use case, or some example use cases, for this feature
The Picasa Web Albums Data API can sometimes be a terrible pain to work with 
(especially with missing CORS support). Having a nice API would offer a lot of 
interesting possibilities like for example custom photo slideshow widgets.

Original issue reported on code.google.com by scaryg...@gmail.com on 18 Sep 2013 at 1:12

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Make this more important,  please! 

Original comment by jamesdou...@gmail.com on 29 Nov 2013 at 5:06

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Original comment by t...@google.com on 6 Jun 2014 at 9:36

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Original comment by t...@google.com on 18 Sep 2014 at 2:20