move images to docs
core function in with unit tests passing
add log marker feature with docs and tests then add to BDD so we get better troubleshooting guideance
AttribInstance from NodeAttrib migration complete with all tests passing
include diagram image
refactor based on testing subclassing in test barclamp
remove tests of legacy models and fix unit test to pass
minor cleanup to remove unneeded constant
Merge pull request #365 from cloudedge/pull-req-master-88c48f4ee579087c974bd5cf1813c795e8781470

Refactor NodeAttrib to be AttribInstance instead [1/2]