Log Message:
Updated to 2.4.5

Upstream changes:
2.4.5 Typo in _draw_x_ticks corrected
      Methods scalar_png(), scalar_jpeg() corrected for result.
      Test routine t/scalarImage.t added
      Chart.pod corrected

2.4.4 The brush styles to points and linespoints are extended.
      Not only circles represent the points but a number of different
      brush styles, linke donut, Star and so on.

2.4.3 Corrections to imagemap production in Composite.pm and Lines.pm