Bump 0.2.0

[horihiro]

Refactoring blurring logic to improve performance and maintainability.
From this version, this extension includes jsdiff

• New features
  • Disable blurring on listed sites on Exclusion URL pattern list
  • Add Context Menu for adding the blurry keywords
  • Add shortcut keys on popup :
    • Ctrl / ⌘ + s: applying keywords/url patterns change
    • Shift + Alt + f: removing empty lines in active textarea
• Bug fixes
  • Improve title masking (#38, #39)
  • Improve unblurring on updating text node by javascript (#40)
  • Improve inputting keywords using RegExp assersions (#41)