maint: merged kadenz.base.js to kadenz.js

* kadenz.js: added kadenz.base.js to the bottom of this file.  The core
classes and methods are now descrived only in this file.
* kadenz.base.js: removed file.
* index.html: removed kadenz.base.js from the header.
kadenz: divided css for the page number to common css

*index.html: added kadenz.css to header.
*css/kadenz.css: new file.
*themes/simple/design.css: removed the description for page number
maint: added lisence and modified introduction and README

*index.html: Improved the introduction.
*README.md: Removed it and rewritted to README.
*README: The readme have been rewritted as the traditional README.
*LISENCE: New file for the lisence.
*template.html: New file for the template.