Merge branch 'dev'

* dev:
  v0.3.4
Merge branch 'dev'

* dev:
  v0.3.5
  changes for v0.3.5
  hmm, change default timer field {upper_90} => {mean_90}
  typo
  metrics type migration howto
  default cleaning interval: 10min
  fix reference error in util
  dropdown menu with 200px..
Merge branch 'dev'

* dev:
  sort default by trending up
v0.3.5
Merge branch 'master' into dev

* master:
  v0.3.5
view: sort => sort by
typofixes
new example statsd config
update readme