Moved media handling into Attachment model; don't resize images smaller than 200px width.
Handle audio and general attachments.
Renamed upload button.
Introduced createFromProto method for Post.
Merge pull request #18 from vden/audio-upload

Adds support of audio files upload.
Merge branch 'show-youtube' of github.com:vden/pepyatka into vden-show-youtube

Conflicts:
	public/css/morda.css
Sets media type for images in the db.