#1211: fix cylc show fine-level clock triggered
cylc test-battery: use global process pool size

Use `process pool size` in site/user global configuration as the
argument for the `-j` option for `prove`.
Use a symbolic link to link parsec tests into the `tests/` sub-directory
so all test files can be found under the same roof.
#1211: work around local datetime behaviour
#1211: fix current_time grabbing
cylc show: add alternate time zone test
cylc test-battery: update usage

Update default test location.
Update concurrency usage.
Merge pull request #1237 from matthewrmshin/test-battery-nproc

cylc test-battery: use global process pool size
fix bad boolean usage
#1211: cylc show: add non-utc-mode test
remove hardcoded reference.log timezone
Merge pull request #1227 from benfitzpatrick/1211.clock-trigger-finer

cylc show: fix clock-trigger time display
Minor hot fix for one new test.
Updated gh-pages index for 6.1.1.
Updated the change log for 6.1.1.