Separate font stuff to font.c, beautify Makefile

data.h

@@ -37,8 +37,14 @@ struct Cell {
  *
  */
 struct Font {
+	/* The name of the font, that is what the pattern resolves to */
 	char *name;
+	/* A copy of the pattern to build a cache */
+	char *pattern;
+	/* The height of the font, built from font_ascent + font_descent */
 	int height;
+	/* The xcb-id for the font */
+	xcb_font_t id;
 };
 
 /*