using spliceFunction for evaluation of SkyClearness
accepted new reference results caused by addition of SpliceFunction in previous commit
converted variable into a final parameter in ExteriorHeatRadidation.mo
changed ShadedRadSol.mo : extended from RadSol so that it uses the same, more efficient implementation
accepted changed reference results due to the changes in ShadedRadSol
these changes are the same as the ones introduced in RadSol
removed angHou output from RadSol since it is never being used
added final modifier to Fssky parameter in ExteriorHeatRadiation.mo
fixed typo in ExteriorHeatRadiDation.mo name
Merge pull request #159 from open-ideas/issue152_groupedEnvironmentCalculations

Simplified environment calculations v2