css: improves h3
css: adds box shadow around images
css: improves spacing for h2
config: ignores swp files
housekeeping: quick refactoring
dropbox: adds dropbox-sdk gem
builds an interface to deal with an (abstract) file provider service
dropbox: adds basic file handler
config: ignoring config file containing (sensitive) env variables
deals with empty folder
dropbox: deals with root path
local file system: adapts implementation to changed interface
shows edit icon only if request is local (for now)
config: makes dropbox the file service