Fixed: blob finish wrong level raised POV parse error.(the AllObjects.blend test scene now renders (though not all objects supported yet))
Added: support for deactivating all shadows from scene shading panel (per lamp 'no shadow' still works)

Some minor pep8 fixes.

Cleaned up Media and photons UI layouts

The output to Tempfiles no longer exports comments, indentations or LFs (in lists).
New option in Export settings to deactivate LF (line brakes) in lists.
Fixed a material export for normal maps. Was exported two times.
Paths to images are now realpaths, no /../ in absolut paths.

Usage: Deactivate "OS Tempfile" to see the new options.
Some UI and code cleanup. 

Fixed Campbell's noticed strange code: a useless or statement
and made clearer clamping for Front and back diffuse.

noticed some strange code, added XXX FIXME.

- metaballs with no supported elements would give an error. no they are skipped.

Lower Delay will rise errors when rendering big images. 
My system Win7 64 (slow HD) reports following error on lower Delay: 
---
Reached EOF while decoding PNG
Cannot open input file
Cannot create backend data
Unknown fileformat
---

Maybe Delay should be bound to the imagesize. Or is there a better solution to wait for povray to finish the writing?

Thanks Campbell

Changed texture scale factor to a better match. Not perfect yet, since user still has to correct scaling by offset.

Commented out a forbidden scene property change. There might be others. We need to find a proper way to translate blender properties to pov ones that are different but achieve the same purpose 

- Automatic indentation in Pov file
- Added "command line switch". (Option to set some command line parameter)

-POV file formatting improvement with UI option and function to handle all tabs/spaces indentation (big clean up)
-use of quote characters made more consistent.

Added some formatting of the pov files and some UI tweaks made by Constantin Rahn (Thanks!). Also the version number had not been updated for a while, I don't know about API number

-pov max trace level (ray depth)
-pov radiosity importance sampling
-Higher Radiosity samples count (allows Halton sampling)
-pov pretrace_start / pretrace_end
FIXED
-incomplete tooltip for pov low_error
-sky_sphere mapping options:
-world sky gradient to follow pov coordinate system
-Skysphere rotation made independant from camera
-generation of skysphere with image map and BlendSky will just consider the texture for now.

All issues reported here 
http://projects.blender.org/tracker/?func=detail&atid=469&aid=23145&group_id=153
by Constantin Rahn, except Layer selective export, adding it to maydo list