Add vendor files for go build

vendor/github.com/alecthomas/chroma/table.py

@@ -0,0 +1,15 @@
+#!/usr/bin/env python3
+from collections import defaultdict
+from subprocess import check_output
+
+lines = check_output(["go", "run", "./cmd/chroma/main.go", "--list"]).decode('utf-8').splitlines()
+lines = [line.strip() for line in lines if line.startswith("  ") and not line.startswith("   ")]
+lines = sorted(lines, key=lambda l: l.lower())
+
+table = defaultdict(list)
+
+for line in lines:
+    table[line[0].upper()].append(line)
+
+for key, value in table.items():
+    print("{} | {}".format(key, ', '.join(value)))