Add requests timeout and error handling

[edudppaz]

From documentation:

Timeout:

>>> http.request(
...     'GET', 'http://httpbin.org/delay/3', timeout=4.0)
<urllib3.response.HTTPResponse>
>>> http.request(
...     'GET', 'http://httpbin.org/delay/3', timeout=2.5)
MaxRetryError caused by ReadTimeoutError

Retries:

>>> http.requests('GET', 'http://httpbin.org/ip', retries=10)
Error Handling:

>>> try:
...     http.request('GET', 'nx.example.com', retries=False)
>>> except urllib3.exceptions.NewConnectionError:
...     print('Connection failed.')