Added Makefile and make rules.

Makefile

+BUILD=build/
+
+# Fix pdflatex search path
+TEXINPUTS := "$(TEXINPUTS):docs"
+TEXFLAGS  := -halt-on-error -interaction=nonstopmode -file-line-error
+TEXGREP   := grep -i ".*:[0-9]*:.*\|warning"
+
+TGT_DIR :=
+TGT_DOC :=
+
+# Default target is 'all'. The 'build' target is defined here so that all
+# sub rules.mk can add prerequisites to the 'build' target.
+all:
+build:
+
+d := docs/
+include base.mk
+include $(d)/rules.mk
+
+d := tests/
+include base.mk
+include $(d)/rules.mk
+
+.PHONY: doc
+
+all: doc build
+
+clean:
+	rm -rf $(CLEAN)
+
+$(TGT_DIR):
+	mkdir -p $(TGT_DIR)

base.mk

+b := $(BUILD)$(d)
+TGT_DIR := $(TGT_DIR) $(b)
+CLEAN := $(CLEAN) $(b)