rose suite-log: source.html: fix undef suite title

Title was displayed as undefined. Now use an AJAX call to load the main
JSON file to obtain the information. This should be more robust than
having to rely on it being parsed as an argument from index.html.
rose suite-run: fix already running bad error.

Was returning a `IndexError: list index out of range`. Should be fixed
by this change.
rose suite-run: improve already running message.

Print "detected PORT-FILE-PATH".
Merge pull request #787 from matthewrmshin/fix.rose-suite-log.source

rose suite-log: source.html: fix undef suite title
Merge pull request #788 from matthewrmshin/fix.rose-suite-run.already-running

rose suite-run: fix already running bad error.
Merge branch 'master' of github.com:metomi/rose into gh-pages