Merge branch 'bug/52' into 'master'

Change the git-hook ignore default to None

When ignore is an empty string, it will apparently not run any checks at
all. Using None as the default ensures that it does run the appropriate
checks.

Closes #52

See merge request !27

flake8/hooks.py

@@ -213,7 +213,7 @@ def get_git_param(option, default=''):
 #   git config flake8.complexity 10
 COMPLEXITY = get_git_param('FLAKE8_COMPLEXITY', 10)
 STRICT = get_git_param('FLAKE8_STRICT', False)
-IGNORE = get_git_param('FLAKE8_IGNORE')
+IGNORE = get_git_param('FLAKE8_IGNORE', None)
 LAZY = get_git_param('FLAKE8_LAZY', False)
 
 if __name__ == '__main__':