Add options to t_jgraphics_text_justification

JGRAPHICS_TEXT_JUSTIFICATION_LEFT_TOP
JGRAPHICS_TEXT_JUSTIFICATION_LEFT_CENTER
JGRAPHICS_TEXT_JUSTIFICATION_LEFT_BOTTOM
JGRAPHICS_TEXT_JUSTIFICATION_CENTER_TOP
JGRAPHICS_TEXT_JUSTIFICATION_CENTER_CENTER
JGRAPHICS_TEXT_JUSTIFICATION_CENTER_BOTTOM
JGRAPHICS_TEXT_JUSTIFICATION_RIGHT_TOP
JGRAPHICS_TEXT_JUSTIFICATION_RIGHT_CENTER
JGRAPHICS_TEXT_JUSTIFICATION_RIGHT_BOTTOM