Deprecate runahead in gcylc.rc
cylc gui: fix pure-families graph view
Merge pull request #1198 from benfitzpatrick/cylc-gui.fix-grouped-graph-crop

cylc gui: fix pure-families graph view
Update syntax highlighting keywords.
Merge pull request #1183 from matthewrmshin/refactor-job-submit

Further refactor to the batch systems logic
Merge pull request #1197 from arjclark/deprecate_gcylc_runahead

Deprecate runahead in gcylc.rc
Merge pull request #1199 from benfitzpatrick/update-syntax-highlight-keywords

Update syntax highlighting keywords
Hot-fix gcylc.rc deprecation version number.
Use command templates for batch system commands

Improve user interface for command template for `at`.