rapidjson: import -master as ams::rapidjson

htc: implement much of worker receive logic

htc: fix copy/paste error in usb driver

htc: free ourselves from the tyranny of numerical enums

htc: implement htclow listener thread

htc: actually use the usb driver

htc: implement complete usb driver

htc: implement (fixing linker errors) through HtclowManagerImpl::OpenDriver

htclow: fix copyright headers, skeleton more manager types

htc: skeleton much of the type hierarchy for htclow manager

htc: skeleton some more of main

htc: skeleton main file/sysmodule dir

kern: alleviate a little KPort pressure.

sm: fix abort on RegisterService while at port limit ...

closes #1382

General system stability improvements to enhance the user's experience.

dmnt: set the debug process handle slightly more carefully

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "bc08912d"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "bc08912d"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

ams: bump version to 0.18.1

ams: add kernel to debug elf zip

fs.mitm: fix cache of non-current-process data storages (closes #1371)

Correct ams_mitm.md formatting ...

Move set_mitm H3's under correct H2 element

psc: fix pm module init

usb: fix wrong command id for AppendConfigurationData

usb: add ds client api

kern: fix support for virtual core IDs

util: add FixedSet

util: add FixedMap::clear

ams: add transient unit testing sysmodule to gitignore

util: various FixedMap fixes

util: add FixedMap/FixedTree