improve Readme.md
add bootstrap.sh for autotools
add .travis.yml file for continuous integration

* install bison 2.6 from source, apt-get does not provide Ubuntu 12.04
update Readme

* info about tarball extraction
* add Travis badge to Readme
fix the MathML script

* remove the need for MathPlayer (Windows only, outdated).
* most browsers render MathML nativeley. Tested Safari and Firefox.
* rename output from xhtml to html.
add files used in tutorial