Added handler for FileHasNoContent exception, some clean up
Added exception for empty files
Added FileHasNoContent string
Little fixes
Added handling for other exceptions in the ImportListLoader.
Added exception is null option to display nothing if no error occured
Fixed some naming
copy public keylist as stub for unified keylist
 progress is shown when creating the default key based on number of keys created so far
Fix for #347
working unified list (no actions yet)
Make EditKeyActivity's uri handling (more) sane

This activity didn't actually use the uri for anything, but just chopped
off the last path segment and interpreted it as row id. What the hell.
Normalize public key uri in KeyListFragment

Find the explicit row id of the public key id given in the uri in
KeyListFragment and work with that. This way, passing in uris by
master key id, mail address, or any other criteria, works.

Might be a good idea to add an actual check if the row id is non-zero
here, but not sure how to do a "bad intent" thing
move some placeholders into resources
add edit button and secret key info to public key view
ditch old key list activities
better handling of multi select in ListKeysFragment
add contact count to My Keys header
Merge pull request #316 from danielhass/import-error

Show error if file import has no content
Revised fix for #347