rose ana improvement.
rose ana development
remove rogue identifier
Extend rose ana to take an argument
rose ana: clarify that currently only the first argument is used.
rose ana allow regular expressions to be specified in the configuration file
rose ana. Report subextract on success and failure
rose ana: correct quote stripping logic
Introduced retry mechanism.
Undid unnecessary change.
Merge pull request #534 from steoxley/rose-ana-dev

rose_ana improvements:
* Handle arguments to command for `{}` string replacement in
  supported configuration settings.
* Flexible output grepper.
Sleep tweak
Merge pull request #536 from arjclark/535-suite-hook-locking

suite-hook locking: introduce retry mechanism to suite-log-view
Split slide
Merge pull request #537 from arjclark/command-tutorial-tweak

optional configurations tutorial: split slide
Merge branch 'master' of github.com:metomi/rose into metomi-gh-pages