cylc/cylc#119: add isodatetime wrapper
cylc/cylc#119: improve import prefix
cylc/cylc#119: add the LGPL isodatetime library from https://github.com/metomi/isodatetime
cylc/cylc#594: fix switch to other suite
Merge pull request #598 from benfitzpatrick/594.fix-switch-suite-gcylc

#594: fix gcylc switch to other suite
Merge pull request #597 from benfitzpatrick/119.iso-input

#119 - ISO 8601 inputs
Removed broken tests/QuickStart/a suite (addresses #581).
temp...
added new suitdef sub-dir...
main cli to vtest command...
line contin...
handle multi-line string values...
more...
more...
validation working...
TODO - restore ordered dicts for environment and directives.
Use new validation in broadcast.
OrderedDicts in DictCopy - NOT NEEDED?
moree..
Sort test battery trigger order.