Assess Versioning on the system

[bradley-erickson]

Every piece on the system ought to be versioned in some way.

• LO and all modules should be versioned
  • Including the extension
  • What about sub-modules within LO?
• Modules should say
  • Requires Learning-Observer==1.0 - We can use pip's version installation format
  • Requires [feature]
• Modules should be able to define migrators between versions of incoming events
• Extension should send version of itself to LO