added Python and shell examples

examples/run_upscale_waifu2x.py

@@ -0,0 +1,24 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# built-in imports
+import pathlib
+
+# import video2x
+from video2x import Video2X
+
+
+# create video2x object
+video2x = Video2X()
+
+# run upscale
+video2x.upscale(
+    pathlib.Path("input.mp4"),   # input video path
+    pathlib.Path("output.mp4"),  # another
+    None,                        # width: width of output, None == auto
+    720,                         # height: height of output, None == auto
+    3,                           # noise: noise level, algorithm-dependent
+    5,                           # processes: number of parallel processors
+    0,                           # threshold: adjacent frames with < n% diff won't be processed (0 == process all)
+    "waifu2x",                   # algorithm: the algorithm to use to process the video
+)