Merge pull request #4 from spatten/master

Adding dbox metadata <remote_path>
History for new release.
Regenerate gemspec for version 0.7.5
History amendments.
Write downloaded files in binary mode.
Version bump to 0.7.6
Regenerate gemspec for version 0.7.6
removing dropbox ruby sdk and requiring it as a gem instead
using Oauth2 to get access tokens and to setup the Dropbox client
Version bump to 0.8.0