Updated Python example module

[msneddon]

This updates the python example module to use local functions and the updated Assembly type. Unit tests all just passed, but we still need to:

• review generated documentation
• figure out what we want to do with other examples
• (done) update tab completion script
• (done: MsneddonContigFilter4 in next) actually register a new python example module and make sure it is runnable in CI
• update kb_sdk version number

Other minor things that would be good to do now that I'm looking at the example are:

• (done) figure out again how to make the right updates to eliminate the python SSL warning (the ones we had been using were broken due to an updated python module)
• update the license file?
• (done enough) clean up the generated README file and provide more info there
• update the generated ui spec/yaml to better match our conventions
• add an example local function spec in the ui directory

[scanon]

It looks good so far. Few remarks inline.

[msneddon]

Ok, I think this is good enough now to do a final review and merge.