* removed paths in include directives
* changed cmake to provide necessary header search paths
* changed name of version.h to productVersion.h due to name conflict
* used wstring in FilePath constructor where easily possible
* added FilePath concatenate method that accepts string parameter
* implemented using only wstring in MessageStatus
* used wstring in config
* also search for include paths of include directives extracted from header search paths
* extracted logic to gather unsolved includes
* extracted some code to filetree class
mlangkabel