Jmol version 3 released.

Jmol version 3 has been released. The following is a brief list of changes:

- Export of BMP and PNG images.
- Rendering of multiple bonds.
- Scaling of vector arrowheads by magnitude which shows significant vectors more clearly.
- Fixed bugs 547574 and 548591.
- Adjustable scaling of vector length from -2.0 to 2.0 times length.
- Import of Ghemical MM files.
- Automatic file type determination used for all loading of files.