Add some more Javadoc

Author: robinst

src/main/java/org/nibor/autolink/LinkType.java

@@ -1,5 +1,15 @@
 package org.nibor.autolink;
 
+/**
+ * Type of extracted link.
+ */
 public enum LinkType {
-    URL, EMAIL
+    /**
+     * URL such as {@code http://example.com}
+     */
+    URL,
+    /**
+     * Email address such as {@code foo@example.com}
+     */
+    EMAIL
 }

src/main/java/org/nibor/autolink/package-info.java

@@ -0,0 +1,5 @@
+/**
+ * Extract links such as URLs and email addresses from plain text. See {@link org.nibor.autolink.LinkExtractor} for
+ * extracting links and {@link org.nibor.autolink.Autolink} for processing links in text.
+ */
+package org.nibor.autolink;