Write README

README.asciidoc

@@ -14,17 +14,19 @@ $ make
 
 Individual files or targets may be specified using `$TARGET`
 
+[subs=+macros]
 ----
-$ make TARGET=demo.tex
-$ make TARGET=resources/tex/chapter.tex
-$ make TARGET=resources/figures/figure.tex
-$ make TARGET=resources/tables/table.tex
+$ make *TARGET*=demo.tex
+$ make *TARGET*=resources/tex/chapter.tex
+$ make *TARGET*=resources/figures/figure.tex
+$ make *TARGET*=resources/tables/table.tex
 ----
 
 Additionally, `$TARGET` may be exported to allow for shorter commands
 
+[subs=+macros]
 ----
-$ export TARGET=resources/tex/chapter02.tex
+$ export *TARGET*=resources/tex/chapter02.tex
 $ make
 $ ...
 $ make
@@ -33,9 +35,10 @@ $ make
 To provide additional configuration to `latexmk` use `$OPTS`.
 For instance, to force build process each time issue
 
+[subs+=macros]
 ----
-$ make OPTS=-gg
-$ make TARGET=resouces/figures/figure.tex OPTS=-gg
+$ make *OPTS*=-gg
+$ make *TARGET*=resouces/figures/figure.tex *OPTS*=-gg
 ----
 
 The Makefile provides different targets, i.e.,