Bump version to 0.0.40
    
    Overview of changes:
    
     *  Branch name is now sanitized in SemVer build data
    
        This was missing for long time ago; some projects use naming
        conventions that employ slashes, which are not even valid filenames,
        so that one dangerous use case is not actually too improbable.
    
     *  Added last git summary to builtin macros
    
        __MKIT_PROJ_GIT_LASTSUMMARY__ now contains last commit message
        summary (first line).  This can be especially useful for quick CI
        usage to avoid confusion.
    
     *  Switched to branch naming scheme using 'latest' instead of 'last'