Added immutable function.

Example usage of immutable write.

  /** example of imMutable */
  generate(
    Background("B"),

    //Source("パターン認識"),
    Source("パターン認識と機械学習の学習ビャムバスレン"),

    TargetAreaInfo(300, 300, 900, 500, 24),

    /** vertical-TOP write */
    //DrawFromKB("top", "left"),
    //DrawFromKB("top", "right"),
    //DrawFromKB("top", "center-left"),
    //DrawFromKB("top", "center-right"),

    /** vertical-BOTTOM write */
    //DrawFromKB("bottom", "left"),
    //DrawFromKB("bottom", "right"),
    //DrawFromKB("bottom", "center-left"),
    //DrawFromKB("bottom", "center-right"),

    /** vertical-CENTER write */
    //DrawFromKB("center", "left"),
    //DrawFromKB("center", "right"),
    //DrawFromKB("center", "center-left"),
    //DrawFromKB("center", "center-right"),

    setFontInfo
  )
Merge branch 'master' of https://github.com/ad-dice/textlib