Add `zkpython` to install requires

add logger handler

add root logger handler

Bump version 0.3.7

Bump version 0.3.6

Bump version 0.3.5

Bump version

Merge pull request douban#100 from douban/ariesdevil-patch-1

Bump version

Merge pull request douban#94 from 6si/enable-heartbeats

Allow the scheduler to receive heart beats

Merge pull request douban#92 from douban/windreamer-patch-1

Bump version