Changes log for v2.1.l (UnderDev) profile

The following changes were made for v.2.1.l on GitHub (released 13-JUL-2017 - UnderDev build).

I added a confirm dialog to the way that the Gateway project dialog comes up (to try and lessen the surprise plus give the ability to delete and re-create - which is often required when you create a project in the same location as an existing one). The main thing in this pre-release is the ability to choose a stereotype when creating a block and to be able to create a block/part part in a single menu command. The combination of these two commands makes it quicker and easier to build white box simulation models. I also made a change to  block led me to make the instance name explicit in the SD template (e.g. a block called Lock might be used to type multiple parts like a frontDoorLock and a rearDoorLock) and there's a small enhancement to include deriveReqt relations in the recently added Select menu.

#218 12-JUL-2017: Added Gateway project Confirm dialogs to advise and provide option to delete and re-create (F.J.Chadburn)
#219 12-JUL-2017: Added Select Depends On element(s)\Derive Requirement menus for deriveReqt relations (F.J.Chadburn)
#220 12-JUL-2017: Added customisable Stereotype choice to the Block and block/Part creation dialogs (F.J.Chadburn)
#221 12-JUL-2017: Fixed Smart Link dialog to draw from middle of IRPGraphNodes rather than top left (F.J.Chadburn)
#222 12-JUL-2017: Allow AddNewBlockPartToPackageMenu to work when right-clicking IBDs and BDDs (F.J.Chadburn)
#223 12-JUL-2017: Change life-lines on simulated <> SD to show Parts rather than Blocks (F.J.Chadburn)