Fixed Layout

Added and modified Constructors like below.

/** init with Start pageIndex
@param startPageIndex is integer value to indicate the index of start page.
*/
-(id)initWithStartPageIndex:(int)startPageIndex;
/** init with Start pageIndex
@param startPageIndex the integer value to indicate the index of start page.
@param spread rendition spread in opf (eg. SpreadNone, SpreadAuto, SpreadPortrait, SpreadLandscape, SpreadeBoth)
*/
-(id)initWithStartPageIndex:(int)pageIndex spread:(int)spreadType;
/** init with Start position
@param start the double value to indicate the position of start page. (eg. 0.0f~1.0f)
@param spread rendition spread in opf (eg. SpreadNone, SpreadAuto, SpreadPortrait, SpreadLandscape, SpreadeBoth)
*/
-(id)initWithStartPosition:(double)startPosition spread:(int)spreadType;