add gemfile
update gitignore
add test-kitchen
ignore lock files
use master as default
re-order
[ruby] Style/StringLiterals
[ruby] Style/TrailingWhitespace
[ruby] Style/HashSyntax
[ruby] Style/TrailingBlankLines
[ruby] Style/LeadingCommentSpace
[ruby] Style/SpaceInsideBrackets
[ruby] Style/SpaceInsideParens
[ruby] Style/EmptyLines
[ruby] Style/IndentationWidth
[ruby] Style/WordArray
[ruby] Style/CaseIndentation
add rubocop config
[ruby] Lint/UselessAssignment
[ruby] Style/FormatString