Upgrade AHC 1.8.1, close #1623
Don't use the global configuration in the HTTP layer
Formatting
Upgrade JsonPath 0.3.3, close #1624
Add mute mode for SBT plugin
Merge pull request #1625 from pdalpra/silent-mode

Add mute mode for SBT plugin
Requests/sec info needs floating-point display, close #1602