Fix async oneoff triggers in cycling sections.

Closes #426
New reference test for combined suites.
Simplified reference test log analyser a bit.
Fix graphing of 'async & cycling => cycling' triggers.
Documentation in the new ref test suite.
Merge pull request #428 from hjoliver/426.fix-combined-suites

Fix async oneoff triggers in cycling sections.
Only add a local doc index if one is defined.
Removed vestiges of original site/user config load method.
Removed a raise that was breaking the suite.
Removed.
Merge pull request #432 from arjclark/submit-invalid-host.bugfix

bugfix: invalid host breaking suite
Merge pull request #431 from hjoliver/430.gcylc-doc-help-x-failure

#430 - fix gcylc doc help x failure. Fixes #430.
cylc images: svg icon
Remove task name case check and warning; closes #435.
Merge pull request #433 from benfitzpatrick/images.add-svg

cylc images: svg icon
Use Ben's new svg icon in gcylc.
Merge pull request #437 from hjoliver/use-svg-icon

Use Ben's new svg icon in gcylc.
Merge pull request #436 from hjoliver/435-remove-case-check

Remove task name case check and warning; closes #435.
Updated the change log for all recent merged changes.
Merge branch 'master' of github.com:cylc/cylc