Merge pull request #363 from cloudedge/pull-req-master-f9b1f81ad8f45c03928d7b816b2879b540b01057

Merged by devtool for cloudedge
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