Executable MBSE and SysMLHelper updates

As an update the SysMLHelper has recently had a couple of updates (latest is v2.1.g). Aim is to finish testing in next 2 weeks, hence it's possible I'll do a couple more updates. These mainly relate to speeding up workflow on the "straight to white-box" modelling workflow. I'm posting details to http://www.executablembse.com/ and preparing a tutorial for this.