Remove package management notes

Doesn't really apply when you can rebuild the entire file system in a
short time and the data contained had legacy information that doesn't
apply to embedded.
Delete dependencies

They were not accurate and the flow of the book dictates the
dependencies.

As an alternate method of identifying dependencies, a header on any
package page that has a dependency could be implemented.
Make beyond-net all common

Was anyway, now is even more.
beyond-filesys: Make more common

Was anyway, now more so.
beyond-intro: Make more common

Was anyway, now more so.
beyond-lib: Make more common

Was anyway, now more so
Delete acronym list
Retitle GCC & Binutils pages for consistency
Move license to prologue

It was the lone remaining appendix and licensing should be easy to find.
Rename prologue to preface

To better match the conventions used in the rendered book
Remove hostapd and libnl

Hostapd is mostly useful when setting up a wi-fi access point or router
system.  This isn't critical and likely isn't the main use-case for
those reading the embedded book since WRT has been removed.

Lib-nl was only needed for hostapd.
organization: Remove appendicies, add cleanup&boot
Delete arch specific changelogs

Only ARM had useful information in it but even that was debatable.  They
serve limited use.
Move hostreqs to introduction

We don't want people to skip this!
Delete whatsnew, wasn't used, won't be
Delete unused livecd information
introduction: Make more common

All was, now is even more.
general: Remove 0.0.1 version string

Embedded has always been a rolling release and the 0.0.1 has never
changed, nor is there any looming concept that a real version release
will ever happen, so remove the version number and just use the date
code to identify the book.
Fix license rendering issue

Improper sub directory left over from moving to the preface.
Fix bootable/x86/kernel permissions