Release 2.1.0

• Add support for sorting by scopes
  PR 973

  Diego Borges

• Added a new logo for Ransack
  PR 972

  Anıl Kılıç, Greg Molnar

• Greek translations
  PR 971
  PR 960

  Sean Carroll, Greg Molnar

• README improvements
  PR 963

  tommaso1

• Bulgarian translations
  PR 961

  Sean Carroll

• README improvements
  PR 956

  Alex Konoval

• Remove lib/ransack/adapters/active_record/compat.rb
  PR 954

  Ryuta Kamizono

• Remove unused aliases
  PR 953

  Ryuta Kamizono