Complete code refactoring

Complete code refactoring for addressing issue#31: now markdown and
latex are enabled into all environments.

Broke backward compatibility:

+ theme is handled by means of standard YAML-format blocks;
+ metadata  is handled by means of standard YAML-format blocks;
+ slide overtheme not copy the main theme by default, but this behaviuor
must be explicitely selected;
+ `--indented` has been purged out: the produced html is by default
indented;
+ add Chapter sectioning: now there are 4 levels of sectioning,
Chapter/Section/Subsection/Slide thus the sectioning has new syntax ('#
=> chapter, ## => section' and so on);
+ modify enviroment style logic: is a style is explicitely added into
the md source the global style for that environment (defined into the
main theme) is not applied;
+ only one package is provided, namely `matisse`;
+ many other minor modifications.

examples/getting-started/getting_started/js/MathJax/extensions/HTML-CSS/handle-floats.js

@@ -1,7 +1,7 @@
 /*
  *  /MathJax/extensions/HTML-CSS/handle-floats.js
  *
- *  Copyright (c) 2009-2013 The MathJax Consortium
+ *  Copyright (c) 2009-2015 The MathJax Consortium
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -16,4 +16,4 @@
  *  limitations under the License.
  */
 
-MathJax.Extension["HTML-CSS/handle-floats"]={version:"2.3"};MathJax.Hub.Config({"HTML-CSS":{styles:{".MathJax_Display":{display:"table-cell",padding:"1em 0 ! important",width:(MathJax.Hub.Browser.isMSIE&&(document.documentMode||0)<8?"100%":"1000em")}}}});MathJax.Hub.Register.StartupHook("HTML-CSS Jax Ready",function(){var a=MathJax.OutputJax["HTML-CSS"],b=a.Translate;a.Augment({Translate:function(c,f){b.call(this,c,f);if(c.MathJax.elementJax.HTMLCSS.display){var e=c.nextSibling;if(!e||e.className!=="MathJax_MSIE_Separator"){var d=a.Element("span",{className:"MathJax_MSIE_Separator"});c.parentNode.insertBefore(d,e)}}}});MathJax.Hub.Startup.signal.Post("HTML-CSS handle-floats Ready")});MathJax.Ajax.loadComplete("[MathJax]/extensions/HTML-CSS/handle-floats.js");
+MathJax.Extension["HTML-CSS/handle-floats"]={version:"2.5.1"};MathJax.Hub.Config({"HTML-CSS":{styles:{".MathJax_Display":{display:"table-cell",padding:"1em 0 ! important",width:(MathJax.Hub.Browser.isMSIE&&(document.documentMode||0)<8?"100%":"1000em")}}}});MathJax.Hub.Register.StartupHook("HTML-CSS Jax Ready",function(){var a=MathJax.OutputJax["HTML-CSS"],b=a.Translate;a.Augment({Translate:function(c,f){b.apply(this,arguments);if(c.MathJax.elementJax.HTMLCSS.display){var e=c.nextSibling;if(!e||e.className!=="MathJax_MSIE_Separator"){var d=a.Element("span",{className:"MathJax_MSIE_Separator"});c.parentNode.insertBefore(d,e)}}}});MathJax.Hub.Startup.signal.Post("HTML-CSS handle-floats Ready")});MathJax.Ajax.loadComplete("[MathJax]/extensions/HTML-CSS/handle-floats.js");