add replication interface
add replication registry and local replication
update the triplestore interface and local replication
lint
wip
single writer
rename
update to master
rename to quads
Make Memstore work with the QuadWriter
convert leveldb to log-structure
speedup and cleanup
merge to master
convert to using real quads
Allow memstore instances to be started empty

This allows easier debugging of web UI problem.
Merge with new Next() interface
add config options and graph.Handle
first swing at mongo indexing (iterator todo)
add iterator check for mongo
test clean