1.5 - Code cleanup / Support og:image:width, og:image:height, og:locale, og:updated_time
1.4 - 5.6 compatible / Twitter Cards Support (BETA)
1.3 - Changed og:type value to "website" at home page / Translation for Japanese has been created
1.2 - Change to using built-in image library
1.1 - Bug Fix with Pretty URL off, Directory install / Support og:description
1.0 - Initial Release