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
isolating configuration
Merge pull request #131 from bolandrm/refactor_config

isolating configuration
Remove superfluous quotes
Remove show_cops_on_duty
Use sensible default configuration

If there is no file/dir specific configuration file present fallback to
the one bundled with RuboCop. This fixes #126.
Display different message for attr_reader/writer
Don't interpret :alias as `alias` keyword
Simplify cop logic