Change Usenet-Crawler to https
Remove obsolete functions using open
Change open to 'with open' and exception IOError to 'EnvironmentError'

Use 'with open' when opening/writing files
http://sdqali.in/blog/2012/07/09/understanding-pythons-with/
The advantage of using a with statement is that it is guaranteed to close the file no matter how the nested block exits.
If an exception occurs before the end of the block,
it will close the file before the exception is caught by an outer exception handler.
If the nested block were to contain a return statement, or a continue or break statement,
the with statement would automatically close the file in those cases, too.

Switch exception to `EnvironmentError`
http://docs.python.org/2/library/exceptions.html#exceptions.EnvironmentError
Since it is the parent of IOError, OSError *and* WindowsError where available.

+ Cleanup test_lib a bit, still needs work.
+ Applied whitespace PEP8 fixes to the files touched.

closes gh-797
Merge branch 'change_usenet-crawler_to_https' into development

* change_usenet-crawler_to_https:
  Change Usenet-Crawler to https
Merge branch 'PR-797_with_open_thezoggy' into development

* PR-797_with_open_thezoggy:
  Change open to 'with open' and exception IOError to 'EnvironmentError'
  Remove obsolete functions using open