Added functions from tcpdf 4.5.032.  - Added to getGroupPageNo function.  - Added to getGroupPageNoFormatted function.  - Added to formatPageNumber function.
Added functions from tcpdf 4.5.032.
 - Added to getGroupPageNo function.
 - Added to getGroupPageNoFormatted function.
 - Added to formatPageNumber function.

planio-gmbh/rbpdf,naitoh/rfpdf,naitoh/rfpdf,planio-gmbh/rbpdf