Add translucent code
Add some function prototypes to mcintegrator.h from 'liyong' project.
Add BSDF_TRANSLUCENT  type to material.h
Update some functions in translucent.cc to actual  YafaRay core.
Add photonkdtree.h header file for some translucent.cc functions.
Note: review and compare to pkdtree.h for a possible merge in one file.
Add some functions for SSS to mcintegrator.cc and photon.cc
Add 'translucent' project to CMakeLists.txt
Integrate SSS code in directlight.cc, pathtracer.cc and photonintegr.cc
Add aligned definitions for MinGw compilers
Uncomment virtual destructor for translucenMat.
Comment unused code for fix some builds warning in photonintegr.cc
Uncomment virtual destructor for pathIntegrator_t. Useful for destorySSSMaps function.
Merge branch 'master' into merge_SSS
Indent code for improve readability.
Change 'exp' to 'expn' for fix conflict with math variable 'exp' (exponential)
Small code indent..
Fix correct number of SSS photons in badge
Add flags for use int64_t  with MSVC++ compilers
Fix corrected number of SSS photons in badge.
Indent some code and convert Tabs to spaces
Delete unused SConscript.
Comment unused REG_KEY code in environment.cc:
    - this application is not installable at the moment..
    - only is useful for Windows systems.
Add small code style changes.
Change project name in draw parameters badge.
Beginning some test for improve mathematical operations using #defines.
Test for use more long numbers in math #defines using scientific calculator.
Mark some debug code comments from implementation author.
Comments "TranslucentData_t struct":
    - now code definition from "core_api/mcintegrator.h" is used.
Using correct name "Translucent" in nodes error message.
Small indent improvements.