Merge pull request #5 from mmn/master

Settings file should be an example, and API.php cleanup
bugfix: attachments not showing

https://github.com/hannesmannerheim/qvitter/issues/8
better naming of js-files
handle the new gnusocial API's URI parameter
more uri-to-url-conversion
updated sprite
remove hardcoded quitter stuff
missing images
bugfix: group undefined
bugfix: in_groups undefined
v3: major change

qvitter is now a plugin
punctuation
unused image
bugfix: ' in title
PHP default for short_tag is OFF in new versions