Add refresh button and implement hiding behaviors
Merge branch 'master' into redo-loading-and-paging
Feed thumbnails link to correct full-sized images.
Merge branch 'fix-image-selection' into redo-loading-and-paging
Update build.gradle to use Gradle version 0.5 and higher.
Update files for Merge.
Merge branch 'master' into redo-loading-and-paging
Update files for Merge.
Implement correct paging and refresh.
Reorganize ActionBar icons.