Move jedi and parso to a single vendored dir

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "rplugin/python3/deoplete/jedi"]
-	path = rplugin/python3/deoplete/jedi
+	path = rplugin/python3/deoplete/vendored/jedi
 	url = https://github.com/davidhalter/jedi.git
 [submodule "rplugin/python3/deoplete/parso"]
-	path = rplugin/python3/deoplete/parso
+	path = rplugin/python3/deoplete/vendored/parso
 	url = https://github.com/davidhalter/parso.git

rplugin/python3/deoplete/sources/deoplete_jedi/server.py

@@ -37,7 +37,8 @@
 except ImportError:
     import pickle
 
-libpath = os.path.dirname(os.path.dirname(os.path.dirname(__file__)))
+libpath = os.path.join(
+    os.path.dirname(os.path.dirname(os.path.dirname(__file__))), 'vendored')
 jedi_path = os.path.join(libpath, 'jedi')
 parso_path = os.path.join(libpath, 'parso')