Added roses directory vs. cylc directory comparison image.
HTML tidy up.
Merge pull request #748 from arjclark/cylc-run-vs-roses

#602: Documentation - Add roses vs. cylc-run comparison image.
rose test-battery: add `skip` function.

Add basic tests for `rose host-select`.
rose test-battery: add `rose suite-hook` tests.
t:rose-suite-hook: remove unnecessary files.
t:rose-suite-hook: more job log rsync tests.

Test with host with/without shared $HOME.
t:rose-suite-hook: add configuration example.
t:rose-suite-hook: more tests.

Also minor change to the settings for configuring these optional tests.
rose.fs_util: symlink: fix logic.

Do nothing if correct symlink target already in place.
Merge pull request #749 from matthewrmshin/t-skip

test-battery: configurable skip
Merge branch 'master' into fix.fs_util.symlink
Merge pull request #750 from matthewrmshin/fix.fs_util.symlink

rose.fs_util: symlink: fix logic.