Sync SPPM parameters names to 'Core'
Expand IRE SPPM definition in Blender UI to 'Initial Radius Estimate'
Extend function for include light from 'add sun' or 'add skylight' in 'Sunsky' or Sunsky2  background mode.
Fix template list name for renderlayers
Merge branch 'master' into IrradianceCache

Conflicts:
	io/yaf_integrator.py
Expand checkSceneLights() function for use 'meshlights' with Bidirectional integrator
Review checkSceneLights() from 'wizofboz' feedback:
    - separate background check to objects.
    - add check for portal lights objects.
Fix AO issue (wizofboz):
    -Fixed error of indentation in 'yaf_integrator.py'
    causer of the error in the use of Ambient Occlusion.
Merge branch 'master' into IrradianceCache