MAde some changes for future improments. Basicly conserning transferring mmultires data between blender and 3d-coat.

Updated version & bl_info,
Added Authors to the base of gpl block as the list was too long.

wedge, sqorus, trapezohedron & star moved to this menu

Fixes #28505: Screencast Keys Add-on Crashes Blender

Fixed an error. It was asking image.filepath even if there was no image. Now make sure that image is always assing it before this call.

Forgot to modify this files in recent commit.

Adding UNDO flag to import operators. Made this only for trunk addons.

by Nick Keeline (nrk)

- Unlimited number of colors
- Configurable Palette folder

* You only have to do layout.prop if you want 1 property, no need for row then!
* Use col, row, sub as variable names, not colsub, rowsub, row2 etc please.
* Povray Addon: Still used a lot of splits, you need no split when you only have 1 column! 

* General Rule (for Ivygen and Sapling): If you need more code for declaring the layouts than for the props itself, something is wrong. ;-)
* if > elif

This script is a valuable video tutorial tool & maintained/managed by senior bf-extensions py devs.

[[Split portion of a mixed commit.]]

thanks to Benjy Cook
well done!

- Fixed the assignment of vertex groups for rectangular leaves. Fix thanks to pawel_xx
- Compressed the UI to make accessing the different parameters easier. Also, the tree is not rebuilt every time a new menu section is accessed.

- Fixed an issue where 'Add New Ivy' and 'Add New Default Ivy' did nothing
- Updated Blender version to 2.59
- Updated Blender revision to 39307