Bugfix - 5281

Now in the process of running the example, number 0. It checks and creates the ./var/log directory if it is missing, which allows the example to run. I did the same for example number three. True, it needs to be completed in the way that the launch is interrupted when the stream worker starts.

dists/examples/0.Beginning/MyChains.py

@@ -6,6 +6,8 @@ import os
 app_name = "MyChains"
 tmp_dir = os.getcwd() + "/tmp"
 var_dir = os.getcwd() + "/var"
+if os.path.isdir(var_dir+"/log") is False:
+    os.mkdir(var_dir+"/log")
 
 json_string = """{
     "modules": ["Crypto", "Events", "Server", "Http", "HttpFolder", "GlobalDB", "Client", "HttpClientSimple", "Mempool",