update docs

3rd/SDL/sync.py

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+#!/usr/bin/python
+
+import os
+import glob
+import copy
+import shutil
+import platform
+
+def joinPath(root, subdir):
+  return os.path.normpath(os.path.join(root, subdir))
+
+# XXX: make sure no no ascii chars in the path name.
+
+SRC_ROOT_DIR=joinPath(os.getcwd(), '../../../3rd/SDL/');
+DST_ROOT_DIR=os.getcwd();
+
+def copyFiles(src):
+    s = joinPath(SRC_ROOT_DIR, src)
+    d = joinPath(DST_ROOT_DIR, src)
+    print(s + '->' + d)
+    shutil.rmtree(d, True)
+    shutil.copytree(s, d)
+
+copyFiles('src');

3rd/agg/README.md

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+# Anti-Grain Geometry
+
+本目录从agg仓库同步而来：https://github.com/zlgopen/agg

3rd/agge/README.md

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+# Anti-Grain Evolution
+
+本目录从agge仓库同步而来：https://github.com/zlgopen/agge