Bump version to 0.1.6
    
    Overview of changes:
    
     *  Reworked testdoc URL operations
    
        Now the testdoc URL is computed by jat.sh during test initialization,
        ie. it can be printed to console and saved to log.yaml.  Ie. the
        base URL shall be set during run, and the owner of the variable is
        now `jat.sh`.
    
     *  Moved test id parsing to new shellfu-bash-jats module
    
        Shared code related to JATS spec should now be in a separate library.
        To avoid cyclic SRPM level dependency via shellfu-bash-jat, the new
        shellfu-bash-jats is distributed separately.
    
     *  jatdoc's suite.md will not use only relative path as section name
    
        Using whole test id makes for a rather ugly doc.