Update to use the OpenJDK 7 Standard Doclet

Updated doclet code is taken from the 7u40 Build b43 Source Release

* https://jdk7.java.net/source.html
* http://www.java.net/download/openjdk/jdk7u40/promoted/b43/openjdk-7u40-fcs-src-b43-26_aug_2013.zip
Update to pegdown:1.4.2