Add timeouts when calling `urllib.request`

[sq6jnx]

When API service is down modules can wait far too long...

I believe 10 second timeout should be OK.

[sq6jnx]

Suggested solution:

• move API calls to base SR0WX module class
• move API calls to dedicated object, possibly with LRU cache

Second option sounds better for me, because in case of calling same URL twice it will not contact any service, but return response from cache.