Add index and Makefile to devel-guide
Move integration guide to devel-guide
Add another section to devel-guide index

The first section of the devel-guide should be a simple walkthrough
example of an application, the second section which should be stuff to
expand on writing an application. Third section, at some point in the
future should be advanced stuff.
Add 'Write a GNOME Shell extension' series
Update docs on adding help
Change the title to GNOME Application Development Platform Overview

The old title was a bit ambiguous.
Left align the grid

Centered alignment in a grid is hard to read.
settings - remove bullets and condense into paragraphs

It's odd to start a page with a list of bullets.
network - refine and condense
communications - refine and condense
lose the button style from the getting started link
media - refine and condense
Remove getting-ready page from platform-demos
Add introduction to new GtkApplication section
Add a skeleton GtkApplication example
Add window example to GtkApplication guide
Add actions example to GtkApplication guide
Add menu example to GtkApplication guide