JavaDoc updates.

Author: Dannemann

src/main/java/com/dannemann/stringcompressor/AsciiCompressor.java

@@ -9,6 +9,9 @@
 /**
  * The base ASCII compressor.
  * @author Jean Dannemann Carone
+ * @see FourBitAsciiCompressor
+ * @see FiveBitAsciiCompressor
+ * @see SixBitAsciiCompressor
  */
 public abstract class AsciiCompressor {