in-app image media preview

// FREEBIE
refactor ListenableFutureTask and make saves async

// FREEBIE
replace ABS with AppCompat

// FREEBIE
enable proguard

// FREEBIE
shorten blocks of text

// FREEBIE
padding workaround for bug in appcompat-v7 21.0.0

bug: https://code.google.com/p/android/issues/detail?id=77982

// FREEBIE
Reset query string when search is collapsed