Make root directory an include path, set #include's properly

Easier to write includes now just using < with the module name, in
comparison to using relative paths.

.dir-locals.el

@@ -3,4 +3,7 @@
 
 ((nil    . ((projectile-project-compilation-cmd . "make")
             (projectile-project-configure-cmd   . "make clean")
-         (+license/license-choice            . "GPLv2"))))
+            (+license/license-choice            . "GPLv2")))
+ (c-mode . ((flycheck-gcc-include-path          . (".."))
+            (flycheck-clang-include-path        . (".."))
+            (company-clang-arguments            . ("-I..")))))

Makefile

@@ -1,5 +1,5 @@
 CC=gcc
-GENERAL-FLAGS=-Wall -Wextra -Werror -Wswitch-enum -std=c11
+GENERAL-FLAGS=-Wall -Wextra -Werror -Wswitch-enum -std=c11 -I.
 DEBUG-FLAGS=-ggdb -fsanitize=address
 RELEASE-FLAGS=-O3
 CFLAGS:=$(GENERAL-FLAGS) $(DEBUG-FLAGS)

examples/fib.c

@@ -15,8 +15,8 @@
 #include <stdio.h>
 #include <string.h>
 
-#include "../vm/inst.h"
-#include "../vm/runtime.h"
+#include <vm/inst.h>
+#include <vm/runtime.h>
 
 int main(void)
 {

vm/inst.h

@@ -16,8 +16,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include "../lib/base.h"
-#include "../lib/darr.h"
+#include <lib/base.h>
+#include <lib/darr.h>
 
 typedef enum
 {

vm/runtime.h

@@ -16,7 +16,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include "../lib/base.h"
 #include "./inst.h"
 
 typedef enum