Feature: Logging

[Mews]

Closes #38

Changes

• Added the logging submodule in logging.py;
  • This just has two functions, a get_logger function that returns the logger object and a set_logging_level function that changes the log level of the logger;
  • Since the logic for this was so simple I removed the logging folder with __init__.py inside and just created a logging.py file, but let me know if I should change that;
• Changed the verbose_print's and print's to use the logger instead (In the Spider class and in fetch_url);
• Removed the verbose_print method of Spider. Instead, the log level of the logger is set according to the verbose argument: True -> DEBUG False -> INFO;
• Replaced capsys with caplog in the tests so that they work with the log output instead of stdout;
• Added test cases for the logging feature;

[indrajithi]

Is it logging with colour?

[Mews]

Is it logging with colour?

It is now :P

You can change the colors used by each log level in the ColorFormatter class inside logging.py