Add hhvm

Signed-off-by: crynobone <crynobone@gmail.com>
Fixed indentation

Signed-off-by: crynobone <crynobone@gmail.com>
Revert changes.

Signed-off-by: crynobone <crynobone@gmail.com>
Add hhvm.

Signed-off-by: crynobone <crynobone@gmail.com>
Release v2.1.0

Signed-off-by: crynobone <crynobone@gmail.com>