Enable 360 day calendar in rose date library.
Align style of new test.
Update documentation.
Review feedback.
Update html page.
Merge pull request #1291 from arjclark/360_day_compatibility

rose date: 360 day compatibility
#1294: fix triggering into duplicate namelists
remove redundant assignment
rose metadata: fix check value for ignored sections' options
Merge pull request #1296 from benfitzpatrick/rose-metadata.fix-check-ignored-section-options

rose metadata: fix check value for ignored sections' options
Merge pull request #1295 from benfitzpatrick/1294.fix-dupl-trigger

#1294: fix triggering into duplicate namelists
Change CYLC environment variable to look at.
Merge pull request #1297 from arjclark/cal_to_cyling_rename

rose date: change CYLC environment variable to look at.
rose task-env now providing ROSE_CYCLING_MODE. rose date now using that.
Tweak documentation.
Merge pull request #1299 from arjclark/rose_task_env_link_cycling_mode

rose task-env/rose-date: use ROSE_CYCLING_MODE
Change 360 to 360day.
Fix test
Add missing doc.
Merge pull request #1302 from arjclark/cylc_cycling_var_content_change

rose date/env: Cylc cycling var content change