indexer changes
replication handler changes
Figure out the launcher path even when we're running with a symlinked tenant dir
Switch the startup order of the launcher to start Solr first.
Use a PID file to track starting/stopping daemons.
Allow the ARCHIVESSPACE_USER to be set outside of archivesspace.sh
Create Solr snapshots on a schedule (once an hour by default)
Suppressing/unsuppressing an accession should trigger realtime indexing
Add a window to the periodic indexer to make it less likely that records will get missed
Tweak startup script to write its PID file under the 'data' directory, and don't clear the environment when running as another user.
Added support for running in a clustered environment.

Includes sample directory structures, configuration files and
supporting scripts.

See clustering/README.md for a tutorial guide on setting this up.
Show a usage for invalid args passed to archivesspace.sh
Markdown syntax tweak
Merge pull request #356 from hudmol/clustering-changes

Clustering changes