Add a mention of files checked by default
Refactor $options into an instance variable
New cop AvoidGlobalVars
Add a few more built-in global variables
Add new cop SpaceAfterControlKeyword
Move #config_from_dotfile and #load_config to Configuration class
Refactor configuration loading
Move file include/exclude methods to Configuration class
Refactor file include/exclude methods
Extract duplicated cop name codes to Cop.cop_name
fixing #125

fixing #125
Merge pull request #128 from yujinakayama/refactor-cli

Refactor CLI
Merge pull request #129 from zeroed/master

fixing #125
more fix for #125
Merge pull request #130 from zeroed/master

more fixing for #125