do not use gravatar and baidu map in test enviroment.
Merge pull request #564 from saberma/saberma-enhancement/stub-gravatar-and-baidu-map-in-test

测试环境不使用 gravatar 和 百度地图
use parallel bundler.
use j8.
use j16.
remove unneccessary bin files.
revert to use j8.
use bundle instead of bundler command in travis.yml
Merge pull request #565 from saberma/saberma-enhancement/use-parallel-bundler

使用并发 bundler
add filter orders
add stat, do refactor
Merge branch 'master' into order-stats
refactor
fixed order price overflow.
enhance dashboard style.
fixed rspec error.
Merge pull request #1 from saberma/saberma-enhancement/566-order-stats

改进销售统计
Merge pull request #566 from jasl/order-stats

销售统计