Add headings for different topics

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1522825 13f79535-47bb-0310-9956-ffa450edef68

Author: britter

src/main/java/org/apache/commons/csv/CSVParser.java

@@ -41,6 +41,7 @@
  * Because CSV appears in many different dialects, the parser supports many formats by allowing the
  * specification of a {@link CSVFormat}.
  *
+ * <h4>Creating instances</h4>
  * There are several static factory methods that can be used to create instances for various types of resources:
  * <p>
  * <ul>
@@ -53,6 +54,7 @@
  * Alternatively parsers can also be created by passing a {@link Reader} directly to the sole constructor.
  * </p>
  *
+ * <h4>Parsing record wise</h4>
  * <p>
  * To parse a CSV input with tabs as separators, '"' (double-quote) as an optional value encapsulator, and comments
  * starting with '#', you write:
@@ -80,6 +82,8 @@
  *     ...
  * }
  * </pre>
+ *
+ * <h4>Parsing completely into memory</h4>
  * <p>
  * You may also get a List of records:
  * </p>