Adding the C code.

I'm keeping the Java file for now as reference.

src/Main.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+
+// 0 = false;
+// 1 = true;
+char version[16] = "v0.5";
+int verbose = 0;
+
+int main(int argc, char **argv) {
+    printf("MMMCalc %s, Copyright (c) 2016 Nicolás A. Ortega.\n", version);
+    printf("This program comes with ABSOLUTELY NO WARRANTY.\n");
+    printf("This program is free software and you are welcome to redistribute\n");
+    printf("under the terms and conditions of the GNU GPLv3 or higher.\n\n");
+    return 0;
+}