Update git remote URL from git.threefold.info to git.ourworld.tf

specs/modelsold/circle/attachment.v

@@ -0,0 +1,15 @@
+
+module circle
+
+// Attachment represents an attachment usable for any object
+// such as email, chat, etc.
+// It is a generic struct that can be used for any object
+// that requires an attachment.
+
+pub struct Attachment {
+pub mut:
+	filename     string
+	content_type string
+	hash         string // Hash of the attachment data
+	size         u32    // Size in bytes
+}