Web requests handling

In this task we want to add some handleFunctions

• using of "github.com/gorilla/mux" is advised, but not mandatory
• func Start(host string, port int) is required to run tests. It should start web listener
• All tests must pass

Endpoints expected by tests:

METHOD	REQUEST	RESPONSE
GET	/name/{PARAM}	body: Hello, PARAM!
GET	/bad	Status: 500
POST	/data + Body PARAM	body: I got message:\nPARAM
POST	/headers+ Headers{"a":"2", "b":"3"}	Header "a+b": "5"

If not defined in table: Request will be:

• No body set
• No headers set Response expected to have
• Status: 200 OK
• Empty body