Fixed issues, tried to implement some of Cuyler files.

diff_settings.py

@@ -0,0 +1,24 @@
+from argparse import ArgumentParser, Namespace
+import common as c
+
+def apply(config, args: Namespace):
+    if args.rel:
+        config["mapfile"] = c.REL_MAP
+        config["myimg"] = c.REL_PLF
+        config["baseimg"] = c.REL_EXPECTED
+        config["source_directories"] = [c.REL_SRCDIR, c.INCDIR]
+    else:
+        config["mapfile"] = c.DOL_MAP
+        config["myimg"] = c.DOL_ELF
+        config["baseimg"] = c.DOL_EXPECTED
+        config["source_directories"] = [c.DOL_SRCDIR, c.INCDIR]
+    config["make_command"] = ["ninja"]
+    config["makeflags"] = []
+    config["arch"] = "ppc"
+    config["map_format"] = "mw"
+    config["mw_build_dir"] = c.BUILDDIR
+    config["objdump_executable"] = c.OBJDUMP
+    config["show_line_numbers_default"] = True
+
+def add_custom_arguments(parser: ArgumentParser):
+    parser.add_argument("-r", "--rel", action="store_true", help="(SPM) Diff a function in relF.rel")