v1.3.7

add http in front of url

add feature to read value from local json file.

v1.3.6

add read from local json file funciton

v1.3.5

Update default cache dir

v1.3.4

Update AgentApplicationService.php

remove var_dump() function

v1.3.3

Update EtcdClient.php

update composer protoapi version

v1.3.2

Update composer.json

v1.3.1

update class name.

Add protoagent support

v1.3.0

update protoagent support

Set value to empty string if value is NULL

v1.2.2

set value to empty string if value is NULL

v1.2.1

fix a bug that env cannot take affect.