Change title from "Preferences" to "Settings".
Modify settings menu and cleanup removed preferences.
FeedImage object now contains event_at field.
Add joda-time libraries to dependency list and build.gradle.
Pass date and time information correctly between activities.
Add info dialog with time and date to image viewer.
Fix date format generation.
Merge pull request #9 from BobbySig/use-local-time

Utilize Timestamps