[Added Ascii art on learn.py] (#727)

* [Added Ascii art on learn.py]
Note : This is by far the best feature of 0.4

python/learn.py

 # ## ML-Agent Learning
 
 import logging
+import random
 
 import os
 from docopt import docopt
+
+    print('\x1b[1;3'+str(random.randint(1, 6))+'m' + '''
+
+    ██╗   ██╗███╗   ██╗██╗████████╗██╗   ██╗
+    ██║   ██║████╗  ██║██║╚══██╔══╝╚██╗ ██╔╝
+    ██║   ██║██╔██╗ ██║██║   ██║    ╚████╔╝
+    ██║   ██║██║╚██╗██║██║   ██║     ╚██╔╝
+    ╚██████╔╝██║ ╚████║██║   ██║      ██║
+     ╚═════╝ ╚═╝  ╚═══╝╚═╝   ╚═╝      ╚═╝
+
+    ███╗   ███╗██╗          █████╗  ██████╗ ███████╗███╗   ██╗████████╗███████╗
+    ████╗ ████║██║         ██╔══██╗██╔════╝ ██╔════╝████╗  ██║╚══██╔══╝██╔════╝
+    ██╔████╔██║██║         ███████║██║  ███╗█████╗  ██╔██╗ ██║   ██║   ███████╗
+    ██║╚██╔╝██║██║         ██╔══██║██║   ██║██╔══╝  ██║╚██╗██║   ██║   ╚════██║
+    ██║ ╚═╝ ██║███████╗    ██║  ██║╚██████╔╝███████╗██║ ╚████║   ██║   ███████║
+    ╚═╝     ╚═╝╚══════╝    ╚═╝  ╚═╝ ╚═════╝ ╚══════╝╚═╝  ╚═══╝   ╚═╝   ╚══════╝
+
+''' + '\x1b[0m')
+
     logger = logging.getLogger("unityagents")
     _USAGE = '''
     Usage: