bug fix
coprocessor aggragator and projector tested
Endpoint working at TupleIterator
endpoint iterator done, need testing
blend default decimal to (39,16) to pass II  test cases
II server side two modes: aggr and nonaggr
minor changes
code refactor && update hfile
support deploying endpoint coprocessor
briding endpoint backend and frontend, add third dependencies to storage.pom
II: most queries on fact table works, except filter on metrics
skip encoding constants at filter serialization
code refactor
Merge pull request #205 from qhzhou/inverted-index

Inverted index
avoid big object creating
further optimze memory usage on endpoint
bug fix
coprocessor aggragator and projector tested
Endpoint working at TupleIterator
endpoint iterator done, need testing