Add contains point method to Region

    inline  Rect        getBounds() const   { return mStorage[mStorage.size() - 1]; }

    inline  Rect        bounds() const      { return getBounds(); }

            bool        contains(const Point& point) const;

            bool        contains(int x, int y) const;

            // the region becomes its bounds

            Region&     makeBoundsSelf();

    return *this;

}

bool Region::contains(const Point& point) const {

    return contains(point.x, point.y);

}

bool Region::contains(int x, int y) const {

    const_iterator cur = begin();

    const_iterator const tail = end();

    while (cur != tail) {

        if (y >= cur->top && y < cur->bottom && x >= cur->left && x < cur->right) {

            return true;

        }

        cur++;

    }

    return false;

}

void Region::clear()

{

    mStorage.clear();