better readme, remove constant file and changed file permission

fn.py

@@ -3,7 +3,6 @@ import os
 import re
 import json
 
-from .constant import TECH_PASS_KEYWORDS
 from pathlib import Path
 
 
@@ -287,7 +286,7 @@ def connect_to_file_output(node_list, file_out=None, base_path='', excludes=None
         
         if tech_pass_names:
             # Filter tech passes
-            tech_outputs = [o for o in all_outputs if o.name.lower() in tech_pass_names] # TECH_PASS_KEYWORDS
+            tech_outputs = [o for o in all_outputs if o.name.lower() in tech_pass_names]
             # Regular outputs (excluding crypto and tech passes)
             regular_outputs = [o for o in all_outputs if o not in crypto_outputs and o not in tech_outputs]
         else: