release_setps

1. Complete you all code changes and test properly
2. Bump version in AptOfflineCore.py, manpage and setup.py
3. Execute make "html" target to create html docs from the manpage
4. Perhaps now, go and do a `git tag -s rel_name`



git archive --format=zip --prefix=apt-offline/ v1.6  > apt-offline-1.6.zip
git archive --format=tar.gz --prefix=apt-offline/ v1.6  > apt-offline-1.6.tar.gz


For a Windows platform release

* unzip apt-offline zip archive generated from above git archive command
* cd to unpacked folder
* `make`
* cd ..
* zip -r apt-offline-VERSION-windows.zip apt-offline