Updated documentation: more specific steps to contributing.
Corrected documentation.

So that markdown looks good while generated at GitHub.
Autogenerating agenda optionally
Agenda template
Merge branch 'feature/agenda' of github.com:AlphaGit/cleaver into feature/agenda
Updated documentation.
Simplified agenda generating logic so that no hierarchy is considered.
Simplifying agenda generation logic.

Assuming the title of the slide (if any) will always be the first line of the slide.