removed unused import
added better spec where working set control arrow located
created query data
finished pass at query structure
added value queries
added result class for JPAQL
added result mapping
finishing up SQL queries
added query locks
added bulk updates
added data model definition
added drawing and model files
added doc links and TODOs
created archetype and moved impl files over to solution
added archetype instructions to exercise
fixed links and pom entries to exercises
Merge branch 'jpa-working' into working to get JPA Query Exercises

Conflicts with src/site/xdoc/index.xml were resolved by taking
version from working after merging with master and updating.
updated name of query solution project
moved sleep within worker
documented move of sleep within worker