bumped major version
moved spec/spec.opts to .rspec
SingletonVariableCheck => ClassVariableCheck
don't list every single file in the .gemspec
cleaned specs structure
added Hash#deep_merge
use const_get instead of eval
improved handling of effective checks
added Hash#symbolize_keys
support config files
updated history
updated README
implemented display of checks and configuration
improved shell output
less newlines in checks list
better display on default options
added license info to gemspec
Merge branch 'master' into config_file
fixed lpad for large numbers