Updated the change log for all recent merged changes.
Merge branch 'master' of github.com:cylc/cylc
Minor start-up documentation fix.
Allow for the icon to fall back to PNG if for some reason the SVG icon
fails (as it does on some older Linux systems).

This should fix cylc/cylc/#440.

Revert "Use Ben's new svg icon in gcylc."

This reverts commit a499141d0e7fe47b3de351e0a3331c1d7ee579fa.

Add back the SVG code with a PNG fallback.
Merge pull request #441 from trwhitcomb/master

SVG icon fallback to PNG if SVG fails
Hot fix (submit command only): update for contact env.
Complete runtime type coercion. Closes #443.

Used in lieu of [runtime] validation in config.py, and in the broadcast
command to coerce command line string values to the right type. This
also corrects a bug in the broadcast command: the try block must be
inside the coercion loops or it aborts at the first KeyError.
Adjust for type-coerced timeout values.
Merge pull request #444 from hjoliver/443.runtime-type-coercion

Complete [runtime] type coercion. Closes #443.
Keep the ssh tunnel alive while background tasks run.
Merge pull request #445 from hjoliver/non-detaching-background-jobs

Keep the ssh tunnel alive while background tasks run.
cylc validate: multiple inheritance broken.
Merge pull request #446 from matthewrmshin/fix.validate.multi.inherit

cylc validate: multiple inheritance broken
cylc misc: add suite.rc syntax highlighting for Kate
Merge branch 'master' into cylc.syntax-highlighting-kate
Merge pull request #447 from benfitzpatrick/cylc.syntax-highlighting-kate

cylc syntax highlighting - kate
site/user config host section "cylc [bin] directory"

This was changed from "cylc directory" to "cylc bin directory" some time
ago under the localhost section but not under the general section. This
change is already backward compatible for anyone using "cylc directory".
Merge pull request #448 from hjoliver/site-config-hosts-section

site/user config host section "cylc [bin] directory"
cylc run: fix hung suite caused by bad START time.
Merge pull request #450 from matthewrmshin/cylc-run.start.bad

cylc run: fix hung suite caused by bad START time.