Log refactoring
Further logfile modernization
Added functionality for multiple logfiles
Implemented precision specifiers
Fixed some formatting issues
Replaced all old log calls with updated ones
Removed the need for Log::freeDefault()
Implemented some write capabilities for properties
Some minor fixes + test case
No need to write two files
Added OS version info to logfile
Fixed KdTree using floats for range search
Replaced isSimilar() of vector with better method
Added new isSimilar() using ulp
Added missing constexpr
Moved OS-dependent stuff into dedicated class
Merge remote-tracking branch 'origin/master' into Renderer
Adopted code to changes in master
Adopted mesh class to new renderer concept