fix imports

MarkdownLivePreview.py

@@ -1,3 +1,9 @@
+import os, sys, sublime
+pkg = os.path.basename(os.path.dirname(__file__))
+lib = os.path.join(sublime.packages_path(), pkg, "lib")
+if lib not in sys.path:
+    sys.path.insert(0, lib)
+
 """
 Terminology
 original_view: the view in the regular editor, without it's own window
@@ -8,9 +14,7 @@ preview_window: the window with the markdown file and the preview
 """
 
 import time
-import os.path
 import struct
-import sublime
 import sublime_plugin
 
 from functools import partial