Doc: add chapter on utilities for suite control

And remove irrelevant sections from the suite tools chapter.
Doc: add chapter on utilities for suite control

Corrections following review.
rose mpi-launch: fix script exit syntax

The on-error `return` statements under `--inner` do not work under
`bash` and may confuse users into thinking that there may be some other
problems. This change should allow errors to be reported with less
confusion.
rose_prune: diagnostics for remote logs prune
Merge branch 'master' into doc-suite-control
Happy 2014
Merge pull request #1075 from matthewrmshin/fix-rose-mpi-launch-return

rose mpi-launch: fix script exit syntax
Merge branch 'master' into doc-suite-control
Doc: add chapter on utilities for suite control

More corrections following review.
Merge pull request #1074 from matthewrmshin/doc-suite-control

Doc: add chapter on utilities for suite control
Merge pull request #1076 from matthewrmshin/diag-rose_prune-remote-log

rose_prune: diagnostics for remote logs prune
Merge branch 'master' into rose-bush-summary