[dense] Add files for new 'dense' module

Breakdown of what the files will contain

* src/dense/ftdenserend.c, src/dense/ftdenserend.h: The 'dense' renderer.

* src/dense/ftdense.c, src/dense/ftdense.h: The rasterizer for the
'dense' renderer.

* src/dense/ftdenseerrs.h: Common error defines.

* src/dense/dense.c: For building a single object of the entire module.

src/dense/dense.c

@@ -0,0 +1,3 @@
+/** For building a single object of the entire module */
+
+/* END */

src/dense/ftdense.c

@@ -0,0 +1,3 @@
+/** The rasterizer for the 'dense' renderer */
+
+/* END */

src/dense/ftdense.h

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+
+#ifndef FTDENSE_H_
+#define FTDENSE_H_
+
+#endif /* FTDENSE_H_ */
+
+/* END */

src/dense/ftdenseerrs.h

@@ -0,0 +1,8 @@
+/** Common error defines */
+
+#ifndef FTDENSEERRS_H_
+#define FTDENSEERRS_H_
+
+#endif /* FTDENSEERRS_H_ */
+
+/* END */

src/dense/ftdenserend.c

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+/** The 'dense' renderer */
+
+/* END */

src/dense/ftdenserend.h

@@ -0,0 +1,7 @@
+
+#ifndef FTDENSEREND_H_
+#define FTDENSEREND_H_
+
+#endif /* FTDENSEREND_H_ */
+
+/* END */