Added following OC functions to download color palette. If file name arg is NULL or empty then the downloaded palette is installed.

int download_palette(LPCSTR lpcszURL, LPCSTR lpcszPALfilename)

At this time it can convert the following:

• Scribus (.xml) (XML)

• Office Color Table (.soc) (XML)

• CorelDraw and Corel PhotoPaint (.xml) (XML)

• Adobe Color (.aco) (Binary)

• Adobe Color Table (.act) (Binary)

• Adobe Swatch Exchange (.ase) (binary)

• JASC PaintShopPro (.pal) (Text)