Change Blog Paradigm to Short-Form

Removes teaser and makes body mandatory.

It also adds support for deleting blogs and
introduces a getAuthorStatus() method to the IdentityManager
that takes a running transaction.

briar-api/src/org/briarproject/api/event/BlogPostAddedEvent.java

@@ -0,0 +1,32 @@
+package org.briarproject.api.event;
+
+import org.briarproject.api.blogs.BlogPostHeader;
+import org.briarproject.api.sync.GroupId;
+
+/** An event that is broadcast when a blog post was added to the database. */
+public class BlogPostAddedEvent extends Event {
+
+	private final GroupId groupId;
+	private final BlogPostHeader header;
+	private final boolean local;
+
+	public BlogPostAddedEvent(GroupId groupId, BlogPostHeader header,
+			boolean local) {
+
+		this.groupId = groupId;
+		this.header = header;
+		this.local = local;
+	}
+
+	public GroupId getGroupId() {
+		return groupId;
+	}
+
+	public BlogPostHeader getHeader() {
+		return header;
+	}
+
+	public boolean isLocal() {
+		return local;
+	}
+}