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-differ/diff_settings.py

@@ -0,0 +1,10 @@
+def apply(config, args):
+    config["baseimg"] = "target.bin"
+    config["myimg"] = "source.bin"
+    config["mapfile"] = "build.map"
+    config["source_directories"] = ["."]
+    #config["arch"] = "mips"
+    #config["map_format"] = "gnu" # gnu or mw
+    #config["mw_build_dir"] = "build/" # only needed for mw map format
+    #config["makeflags"] = []
+    #config["objdump_executable"] = ""