* Pass NameHierarchy to record new symbol returning an Id
* Cache symbol Ids in Parser implementation
* Reuse symbol Ids as reference when recording related data
* Pass FilePath to record new file returning an Id
* Cache file Ids in CanonicalFilePathCache
* Store file Id in ParseLocation instead of FilePath
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* 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
* use wstring in symbol and bookmark names
* fixed setting apppath in windows includes
* regard utf8 encoding in shared indexer commands
* regard utf8 encoding in shared indexer status
* 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
* improves indexing performance by roughly 5%
* switched to use uniqu_ptr for boost path to get rid of including boost in header
* added different methods to change the current FilePath or to make a copy and change that one
* used these methods appropriately throughout the code base
* removed exists() method from FileSystem because it is already contained in FilePath
* added const in some places
* added CanonicalFilePathCache to also reserve the initially recorded casing of file names
* use canonical file path cache to resolve filepaths in names of symbols (anonymous, static, ...)
* null reference fixes
