sdk-manual: New Projet chapter added and other fixes

sdk-manual: New Projet chapter added and other fixes

I extracted the sections on Makefile, Autotools, and Eclipse into
their own new chapter.  Seemed to make sense as they are projet
types for both standard and extensible SDK types.  Also, swapped
the order of appearance from standard first to extensible first.
This swapping caused a bit of rewriting.

(From yocto-docs rev: 138a4d5576123da800a8fd8d99462a138ceeb743)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>