Update image test following code change
Add travis support
Add controls="controls" when generating <audio> tag
Discard src attribute from audio and video tags

Because we're already using <source> tag
Add controls="controls" in video tags
Only generate autoplay="autoplay" when autoplay is true in cnxml

autoplay="false" causes the audio and video to play automatically
Merge pull request #61 from Connexions/add-travis-and-fixes

Add travis support and fix audio and video tags
Update media.html following audio and video html transformation fixes

- Remove "src" from audio and video tags as <source> is already used
- If autoplay is true, set autoplay="autoplay" in audio and video tags,
  if autoplay is false, remove the attribute
Add xsl/test/ to automated test suite

Use xsltproc to transform xsl/test/*.cnxml files with
xsl/cnxml-to-html5.xsl and compare with xsl/test/*.html files
Merge pull request #63 from Connexions/more-tests

Add xsl/test/ to python automated test suite
use the data-type attribute instead of class
replace data-class with just class and fix code
remove xhtml namespace
clean up the HTML and some conversion back to cnx
add abstract data-type
change spans to *
hack to get notes with headings to be valid cnxml
add the book title and abstract