R2-0 (May 23, 2018)

fixes to issues with Coordinate System motors demand and read-back
inconsistency
fixes to any issues with race conditions due to a lack of parameter
library locking
now works with clipper
supports 'direct demands'
- for avoiding the pitfalls of the motor record (particularly with
  deferred moves)
implements coordinated deferred moves:
- a set of motors can be commanded to start and complete motion at
  the same time.
updated edm GUI
simplified templates and builder support
stop now always works
- stop a trajectory scan or coordinate system motor by clicking
  stop on one of the real motors
full suite of system tests using py.test

Note that I'm now making dls-master and master the SAME. To make
this friendly to external users I have:-

I have fixed the etc/Makefile so that it skips the folder if builder
is not available
I have commented the required configure files to say they need
changes for each site
I have added a non-builder example IOC (with edm GUI)

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