v0.5.1

• Better windows manipulations:
  • Move opening window from contextMenus to a separate module.
  • If an window already exists, focus it instead of reopening.
  • Listen for the windows onRemoved and remove window from the list when it is closed
• Use stateless components.
• Update babel, react, redux and eslint.
• Use reagent for testing
• Improve tests for Travis and add AppVeyor build.
• Enhance webpack config.
• Add alias for the extension path.
• Fix unsupported parameter in latest Canary.