updated for EPUB3 support, not completed yet
An version that could work, but only could work
fix issue in last commit to pass EPUBv2 validation
add support for EPUB v3
change chapter split method

use 'code.google.com/p/go.net/html' to split chapters
TOC level can now be different to split level
add support for DuoKan full screen image
add option to toggle DuoKan externsion (not completed)
add command line option for EPUB version and DuoKan externsion
revised documentation