Blender Git Loki

patch from Maurice & Patsoko on blenderartist for win32 registry support,
moved "import winreg" inline, (so other OS's don't import it), untested but should be ok.

--- From the thread
It's the version of r23036 + winreg patch from Maurice.

About the registry keys:
- I have povray 3.6 and 3.7b34 installed on vista32.
- In the registry, I have 3 choices : ' CurrentVersion ', ' v3.6 ', and ' v3.7'.
- I've modified Maurice's patch by replacing CurrentVersion by v3.6. We have the benefit to have the keys for each version so I prefer use them rather than the 'floating-key-about-which-is-the current-version'. I found more secure like that.