Added concurrent validation stages.  Still needs the correct scheduling
Fixes scheduler setup
Merge branch 'two-dot-o' of github.com:usergrid/usergrid into two-dot-o
Fixed to use an I/O pool
Added Cassandra Scheduler
Merge branch 'concurrent-validation' into two-dot-o
Added I/O scheduler to concurrent framework.
First attempt at ChangeLog class and generator interface.
Merge branch 'two-dot-o' of https://github.com/usergrid/usergrid into two-dot-o
adding decoupled configuration
Merge branch 'two-dot-o' of https://github.com/usergrid/usergrid into two-dot-o
adding dynamic cassandra configuration and tests