Simple HTTP Server

Related to #3.

This webserver should listen to a specific port and receive incoming requests from Gitlab. Once the requests are received, based on the type of the event, it should show to the user in Qt creator UI - relevant updates.

In future, it should also run any specific actions defined by the user.

Example of such relevant updates are:

• build finished
• build failed, view details

At this moment, we are using the Simple HTTP web server implementation from python with a custom router.

Example code in our context:

```
global webhook_path, webhook_token

import http.server as CuteHttpServer
import socketserver as CuteSocketServer
from urllib.parse import urlparse as UrlParser
from urllib.parse import parse_qs as QueryStringParser

class CuteRouter (CuteHttpServer.SimpleHTTPRequestHandler):
def do_GET (self):
self.send_response(200)
self.send_header("Content-type", "text/html")
self.end_headers();
self.wfile.write ("You asked for path: {0}".format(self.path))

def do_POST (self):
path = self.path
path.startsWith("/gitlab-incoming"):

1. get the token and check it with token generated earlier
   self.send_response (200)
   self.end_headers()
   self.wfile.write("OK")

try:
httpd_server = CuteSocketServer.TCPServer((host, port), CuteRouter)
https_server.serve_forever()
except KeyboardInterrupt:
httpd_server.server_close()
```

All relevant issues or tasks - related to HTTP Server should be created under this.