Log Message:
py-kb: Update to 0.1.7

Changes:
0.1.7
-----
  * Fixed grep bug with pull request 89
  * XDG Compliance: moving files to `$XDG_DATA_HOME/kb`, if it exists, and fall back
    to `$HOME/.local/share/kb` if that environment variable does not exist
  * Added kb to pkgsrc
  * Added stdin functionality to add artifacts. For example:
    `cat ../script.py | python -m kb add -t mycoolscript`
    `cat path/to/script.py | python -m kb add -t mycoolscript -c python_scripts`
  * Implemented the confirmation mechanism for artifact removal