- Add mentions to SWD
- Sony's OpenOCD fork no longer needed since Nuttx support was merged upstream
on http://openocd.zylin.com/#/c/4103/. Recommended to build from source or use
one of the unofficial, more recent builds.
- Amazon link for Olimex adapter was no longer available so removed.
- Reordered and some parts rewritten
- change Gnu to GNU
- fix formatting and link fixes
- add menuconfig screenshot
- replaced config file edits with kconfig-tweak
- fix section numbering
- removed leftover todo in quickstart/index.rst
- rewrote debugging section to use menuconfig