Layout bugs and dot bullets

Added dot bullets.
Option to append text to the content object of a slide based on the
"text and content" layout.
Bug: Fix creating invalid pptx files when using styles.

Speaker notes support for Office 2013

Speaker notes support for Office 2013

Improved speaker notes and layouts support

Improved API for:
Making speaker notes.
Making slides by layouts.

Typo

Small typo

Preparing for version 0.4.1

Doing tests and review

version 0.4.0

Working Charts support

Version 0.2.11

Bug fixes release:

Version 0.2.8

I had to drop the support for node 0.8.x but I'll be more then happy if
someone can fix it. The problem is with the package "startpoint" which
is not supporting node 0.8.x.

Version 0.2.7 - automatic fields

Supporting automatic fields for pptx files.
Some minor bug fixes.

Version 0.2.6

Automatically support line breaks for both PPTX and XLSX.
Fix a bug with using effects.