Add tap to view image
New TagActivity (where image comment will be viewable)
Updated MainActivity that passes along the image path
ThumbnailAdapter that generates the thumbnails and resolves full image
paths (forgot to check in in previous commit)
Add menu option that allows selecting an image from a Gallery
application instead of the grid provided by the application.
Properly scale images in image view
Tapping image will load it in viewer of choice (e.g. Gallery)
Add comments referring to where code samples were obtained