abstract models
fix int => int64
fix unsed error
Merge branch 'dev' into faster-loading

* dev:
  1: exclude docs directory which is auto-generated t# Explicit paths specified without -i or -o; assuming --only paths...
  add ts router
  for url
parallel query
fake interface for fe
for search
change fake interface
for intro
parallel query
parallel query
Merge pull request #23 from yujinqiu/faster-loading

Faster loading. Step 1: Parallel query
1: parallel query and fix empty time series out of index.
Merge pull request #24 from yujinqiu/faster-loading

1: parallel query and fix empty time series out of index.
Merge branch 'next' of github.com:yujinqiu/ServiceTree into next

* 'next' of github.com:yujinqiu/ServiceTree:
  for intro
Merge branch 'next' into dev

* next:
  for intro
add metric id to query info
fix host query timeseries empty bug
Add unit correct feature
faster load speed