Add mg settings

mg/.gitignore

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+.mg

mg/Makefile

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+include ../functions.mk
+
+files: .mg
+
+.mg: mg.org
+	$(call tangle)

mg/mg.org

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+#+TITLE: mg
+#+PROPERTY: tangle .mg
+#+STARTUP: showall
+#+OPTIONS: author:nil num:nil toc:nil
+#+HTML_HEAD: <link href="https://ryuslash.org/org.css" rel="stylesheet" type="text/css" />
+
+I don't use mg to look at C files often, but when I do, I want
+=c-mode= to be activated.
+
+#+BEGIN_SRC fundamental
+  auto-execute *.c c-mode
+#+END_SRC
+
+One of the nicest features of Emacs, for me, is its automatic indent
+system. Mg can do this too.
+
+#+BEGIN_SRC fundamental
+  auto-indent-mode 1
+#+END_SRC
+
+I don't like how backup files clutter my directories. I do like having
+them around, just in case. So instead of saving them wherever we find
+them, save them in =~/.mg.d=.
+
+#+BEGIN_SRC fundamental
+  backup-to-home-directory
+#+END_SRC