Updates RTL functions from tcpdf 5.2.000.  - Updates to SetRTL functions. (4.6.020)  * Table cell alignments for RTL booklet mode were fixed. (4.8.012)    - Updates to closeHTMLTagHandler functions.  * The handling of temporary RTL text direction mode was fixed. (4.8.014)    - Updates to openHTMLTagHandler functions.    - Updates to SetTempRTL functions.    - Added to isRTLTextDir function.
Updates RTL functions from tcpdf 5.2.000.
 - Updates to SetRTL functions. (4.6.020)
 * Table cell alignments for RTL booklet mode were fixed. (4.8.012)
   - Updates to closeHTMLTagHandler functions.
 * The handling of temporary RTL text direction mode was fixed. (4.8.014)
   - Updates to openHTMLTagHandler functions.
   - Updates to SetTempRTL functions.
   - Added to isRTLTextDir function.

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