Update Makefile for vim integration

* Updaet documentation
* Add missing error transformation script
* Make fix patht to transformation script

Makefile

@@ -1,8 +1,14 @@
+# this make file is just a small wrapper/helper to easily use this workspace within vim
+#
+# 1. Build workspace within vim and retrieve compile errors + warnings
+# :make c
+# 2. Format the code
+# :make  f
 
 t: c
 
 c:
-	cargo build --workspace --message-format=json | python3 ~/.bin/rerr.py
+	cargo build --workspace --message-format=json | python3 ./scripts/rerr.py
 
 f:
 	cargo fmt

scripts/rerr.py

@@ -0,0 +1,11 @@
+#!/usr/bin/env python3
+import sys
+import json
+
+for line in map(str.rstrip, sys.stdin):
+    m = json.loads(line)
+    try:
+        for s in m["message"]["spans"]:
+            print("{}:{}: {}".format(s["file_name"], s["line_start"], m["message"]["message"]))
+    except:
+        pass