Tuichat

Hotfix:
* Fix problems with packaging and distributing program

Add:
* Number of new messages
* New asynchronous algorithm of receiving messages
* Message types
* Disconnecting with CTRL + C in client and server
* User can change server and client header with special files
Remove:
* Old threading-like algorithm of receiving messages
Optimization:
* Fix variables problems
* Improve speed
* Rename PYChat to TuiChat

Add:
* Check for the number of characters in the client
Optimization:
* Fix variables problems
* Optimize server by reducing message receive buffer size
* Move some code to another functions

Update UI
1. Update **logo** of **client** and **server**
Update message-formatting algorithm
1. Now messages will be sent in JSON format
Fix bugs
1. Fix reconnecting
2. Fix bug in sending programming language code
3. Fix validation of values in configuration file
> Full list of fixed bugs look at [closed issues](https://github.com/Kukree/PYChat/issues?q=is%3Aissue+is%3Aclosed)
Big refactoring of code
1. Move some blocks of code to other package named **pychat_utils**
2. Optimized imports
3. Optimized functions, make it more clean

Add first version UI:
1. Borders in some blocks of information
2. Left border for server messages
3. Logo in header
Add:
1. Server closed message in client
2. Attempts for enter data to connect to server

Add **saving history log**
You can save log of user messages, connections and disconnections in **log.txt** file