wrapping Local_store in Batched_store
implemented batched store
small cleanup of STORE module type
verifying current transaction in batched_store and mem_store
added 008_install_dev_env.sh to jenkins/{quick/left/right}
fixed delete_prefix and rev_range in batched_store
fixed catchup only test
fixed potential bug which could cause an individual update to be applied twice
fixed some remarks from the pull request
Batched_store max_entries and max_size is now configurable
Output of entire cluster_cfg on node startup
Fix for regression in batched_store of previous commit
Merge remote-tracking branch 'refs/remotes/origin/batched-local-store' into 1.6

Conflicts:
	src/node/catchup.ml
	src/node/catchup_test.ml
	src/node/collapser_test.ml
	src/node/node_main.ml
	src/node/store_test.ml
	src/system/startup.ml