Added / started some infrastructure / boilerplate code.

src/main.c

@@ -1,5 +1,21 @@
 #include <stdio.h>
+#include "../includes/futil.h"
 
 int main(int argc, char** argv) {
-    printf("Hello World\n");
+    char* file;
+    size_t count;
+
+    if (argc <= 1) {
+        printf("Usage: assm <file.asm>\n");
+
+        return 2;
+    }
+
+    if (!ReadAllString(argv[1], &file, &count)) {
+        printf("Failed to read file '%s'.", argv[1]);
+
+        return 1;
+    }
+
+    printf(file);
 }