Renamed stack.sh to titan.sh
Reorganizing titan-dist src/assembly directories
Moving rpm/deb packaging files into titan-dist
Added quickstart and persistit distros
Moving titan-dist-* submodules into their parent

I'm trying to reduce the number of archive modules in Titan.  We had
almost as many as we did actual source code modules, spreading out our
distro-related files over a painfully disordered directory structure.
Trying to centralize everything in a single module using profiles in a
way that won't break the release plugin.  Not well tested.
Revert "Moving titan-dist-* submodules into their parent"

This reverts commit 09f33171c3601018926a094f6a5cd0ad91a37e8a.

The previous commit tried multiple profiles with different dependency
sets in the same pom.xml, with the intent that each profile's
execution would get evaluated using only its dependency set.  This is
futile when multiple profiles are active at the same time.  All of the
profiles' dependencies are merged into a single set shared across all
profile executions.  I don't see a way to have different dependency
trees in the same execution of a single pom.xml, so I'm reverting back
to lots of distro submodules.
Adding ES config to quickstart distro