Getting Started documentation update.

* Put Core Build and Managed Build items in separate topics.
* Added two images to Creating a CMake project.
* Added new pages about creating a CBS Makefile project, using
  existing code, and the launch bar.
* Renamed "Creating a simple application" to "Creating a Managed Build
  System Makefile project" and replaced two images.
* Removed "Creating a Makefile project", because it was duplicate
  information.

Fixes #992

Author: ewaterlander