prefix now a file

PREFIX.md

@@ -0,0 +1,4 @@
+# python-gjk
+
+Učí profesor Kubis a docent Veškrna.
+

README.md

@@ -37,3 +37,6 @@ Učí profesor Kubis a docent Veškrna.
 
 ## [9](9)
 
+## 
++ [PREFIX](PREFIX)
+

site_gen.py

@@ -3,12 +3,6 @@
 import os
 from functools import reduce
 
-PREFIX = '''# python-gjk
-
-Učí profesor Kubis a docent Veškrna.
-
-'''.splitlines()
-
 def get_mds(path):
 	results = []
 	for i in os.listdir(path):
@@ -47,9 +41,15 @@ def path_dict(files):
 		di[x].append(y)
 	return di
 
+prefix = []
+if os.path.exists('PREFIX.md'):
+	with open('PREFIX.md') as p:
+		prefix = p.readlines()
+
 files = sorted([i[2:] for i in get_mds('.') if i != './README'])
 
 with open('README.md', 'w') as f:
-	to_write = PREFIX + mkformat(files)
+	to_write = mkformat(files)
 	to_write = [i + '\n' for i in to_write]
+	to_write = prefix + to_write
 	f.writelines(to_write)