Make sure to pass the "private" status to the PhotoViewer
Removed using ReaderBlogTable.getBlogInfo() to check whether image is in a private post. That was a possible NPE, and the post already tells us whether it's private.
Use separate ReaderLinkMovementMethod instances so we handle images in private posts correctly.
Removed unnecessary HTTPS enforcement when showing photo from ReaderPostDetailFragment
Merge branch 'develop' of https://github.com/wordpress-mobile/WordPress-Android into issue/1785-Private-images-photo-viewer

Conflicts:
	WordPress/src/main/java/org/wordpress/android/ui/reader/ReaderPostDetailFragment.java
Resolved conflict with previous merge from develop
Merge pull request #1791 from wordpress-mobile/issue/1785-Private-images-photo-viewer

Reader - Enable private images in PhotoViewer