qa/workunit:  Update pjd script to use new tarball

The pjd script now uses the latest version of pjd
with an additional test for opening a non-existent
file.

Signed-off-by: Sam Lang <sam.lang@inktank.com>
doc: Added memory profiling to the index.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Added a memory profiling section. Ported from the wiki.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
Merge branch 'master' of https://github.com/ceph/ceph
Merge git://github.com/ceph/ceph