simplify UI flow

add dropbox sdk usage

add readme for shoot app

Add AGDropboxAuthenticationModule

replace Dropbox by Flickr

replace ObjectiveFlickr with AFOAuthClient library

upload with AGPipe

OAuth1 authentification with AGOAuth1Authentication

uploading test

test
authz to google
upload
file upload
shoot'nshare has a readme documentation
clear unused files
Shoot project is without reference to unused picture
update pods
cleanup and source format
layout fix and added placeholder
cleanup and metadata support
refactor to authorize at startup