Add makefile template

Contains the self-documented makefile
(http://marmelab.com/blog/2016/02/29/auto-documented-makefile.html)
snippet, and a small makefile tutorial.

vim/settings/templates.vim

@@ -1,6 +1,10 @@
 " Template for shell scripts.
 " Removes comments after line 1, places cursor at end of file.
-autocmd BufNewFile *.sh 0r ~/dotfiles/vim/templates/bashscript | silent 2,$ g/^#/d | normal G
+autocmd BufNewFile *.sh silent 0r ~/dotfiles/vim/templates/bashscript | silent 2,$ g/^#/d | normal G
 
 " Make shell scripts executable on save.
 autocmd BufWritePost *.sh if getline(1) =~ "^#!/bin/" | silent !chmod +x <afile>
+
+" Template for makefiles.
+" Removes comments, places cursor at end of file.
+autocmd BufNewFile [Mm]akefile silent 0r ~/dotfiles/vim/templates/makefile | silent 4,$ g/^#/d | normal G

vim/templates/makefile

@@ -0,0 +1,61 @@
+# Title
+
+# Auto-Documenting Section. Displays a target list with `##` descriptions.
+#
+# http://marmelab.com/blog/2016/02/29/auto-documented-makefile.html
+# This will run as the default target i.e. `make` with no arguments.
+# Unlike the blog post from which this is taken, there is no output colorisation
+# (e.g. `\033[36m`) for better compatibility in different setups.
+help:
+	@grep -E '^[a-zA-Z_-]+:.*## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "%-15s %s\n", $$1, $$2}'
+.PHONY: help
+
+example: dependency ## Run the example task
+
+dependency: ## Run example's dependency
+
+# Ultra-Small Makefile Tutorial. (Fuller tutorial: http://makefiletutorial.com)
+# This is a valid makefile:
+#
+#     # Comments start with a `#`
+#     # Put plain shell commands (/bin/sh) on each line.
+#     target1:
+#     	touch target1
+#     	@echo "silenced lines are not printed, but command output is shown."
+#     	# Argh, this comment line is printed!
+#     	@# Note: First target = Default i.e. `make` = `make target1`
+#
+#     target2:
+#     	@# Each line is its own shell instance. The `cd` below has no effect.
+#     	cd ~/dotfiles
+#     	touch target2
+#     	@echo "** Multiple commands can be"; echo "** separated by semicolons"
+#
+#     target3: target4
+#     	@# Oh, this target has a dependency!
+#     	touch target3
+#
+#     target4:
+#     	@# This will be called by target3, and will be run before target3 does.
+#     	touch target4
+#
+#     # declare a variable string
+#     all = target1 target2 target3 target4
+#
+#     # use a variable string (as list of dependencies)
+#     everything: $(all)
+#
+#     clean:
+#     	@# `clean` is not a special word. You have to build `make clean` yourself.
+#     	rm $(all)
+#
+#     # Target names are actually expected files, so if a file with the target name
+#     # exists, a target will not run:
+#     #
+#     #     $ touch clean
+#     #     $ make clean
+#     #     make: `clean` is up to date.
+#     #
+#     # Use `.PHONY` to not do a file check. Now `clean` will always run.
+#     .PHONY: clean
+#