Add basic auth support and error check for http(s) handlers

[drunkbatya]

• Add basic auth support and error check for GelfHttpHandler and GelfHttpsHandler

[keeprocking]

Hi, I'll look into it this week.

Thank you.

[drunkbatya]

I added an error checks again, through try/catch construction, and also assert for status code to catch unauthorized and other https errors. I replaced throwing exceptions with native logging's self.handleError(record) . This also may close issue 52.

[drunkbatya]

@keeprocking does I need to make any changes before merge may occur?

[keeprocking]

Hi, sorry for the delay - I'm currently undergoing medical treatment and will get back to this as soon as possible. No exact time frame, sorry.

[chilledornaments]

@drunkbatya would you mind adding tests for this functionality? I believe you need to add new inputs here and more params to tests/test*.py (for example)