Convert every submodule into subrepo (#170)

* remove ZAPD submodule

* git subrepo clone https://github.com/zeldaret/ZAPD.git tools/ZAPD

subrepo:
  subdir:   "tools/ZAPD"
  merged:   "ca229f19"
upstream:
  origin:   "https://github.com/zeldaret/ZAPD.git"
  branch:   "master"
  commit:   "ca229f19"
git-subrepo:
  version:  "0.4.3"
  origin:   "???"
  commit:   "???"

* git subrepo clone https://github.com/simonlindholm/decomp-permuter.git tools/decomp-permuter

subrepo:
  subdir:   "tools/decomp-permuter"
  merged:   "1e4b85a7"
upstream:
  origin:   "https://github.com/simonlindholm/decomp-permuter.git"
  branch:   "main"
  commit:   "1e4b85a7"
git-subrepo:
  version:  "0.4.3"
  origin:   "???"
  commit:   "???"

* Remove asm-differ

* git subrepo clone https://github.com/simonlindholm/asm-differ.git tools/asm-differ

subrepo:
  subdir:   "tools/asm-differ"
  merged:   "eaf72269"
upstream:
  origin:   "https://github.com/simonlindholm/asm-differ.git"
  branch:   "master"
  commit:   "eaf72269"
git-subrepo:
  version:  "0.4.3"
  origin:   "???"
  commit:   "???"

* remove asm-processor

* git subrepo clone https://github.com/simonlindholm/asm-processor.git tools/asm-processor

subrepo:
  subdir:   "tools/asm-processor"
  merged:   "85288fcd"
upstream:
  origin:   "https://github.com/simonlindholm/asm-processor.git"
  branch:   "master"
  commit:   "85288fcd"
git-subrepo:
  version:  "0.4.3"
  origin:   "???"
  commit:   "???"

* remove .gitmodules file

* Update REAMDE

* Update warnings

tools/asm-processor/.gitrepo

@@ -0,0 +1,12 @@
+; DO NOT EDIT (unless you know what you are doing)
+;
+; This subdirectory is a git "subrepo", and this file is maintained by the
+; git-subrepo command. See https://github.com/git-commands/git-subrepo#readme
+;
+[subrepo]
+	remote = https://github.com/simonlindholm/asm-processor.git
+	branch = master
+	commit = 85288fcdfefd5d2644d9bac1230c8b4aa7c92024
+	parent = 492b92579d6bc30f635cbcc3852de1b17ed1bc43
+	method = merge
+	cmdver = 0.4.3