* Change title to "Tools to automate image creation" as more appropriate
to the content
* Divide tools in OpenStack and externals
* Include TOC
* Remove imagefactory (last commit 4 years ago) and VeeWee (last commit
6 years ago)
* Replace Kiwi legacy with KIWI NG
Change-Id: I6d3f92e5acbe32f1c61b8f2d58a7fcbcda821f33