Technical level of saved project's file is the compatibility level of fiels.
When adding informations to the project file, the TL change to reflect
an incompatibility
TL01 : First release
TL02 : Added description, changed summary from TStringList to string
TL03 : Added FilesIncludeList and FileExcludeList, Deleted RootDirectory
TL04 : Changed format from raw binary component stream to XML format
TL05 : Added ocRecords and ocUnits in TOutputCategoryList enum