Vertical sections separators and recursive markdown

Vertical separation are a double separation:

```

---
---

```

Markdown are included recursively from src source.
Set slides values (title, theme...)
Add description in README.markdown
Includ fontawesome.
Some CSS for UDA.
Add some style for speaker slide.
Compiled css.
First build of index.html
Code blocks on 2 columns are back to middle vertical align.
Add Speaker slides.
Compiled themes.