Implement Interfaces module.

Signed-off-by: leo-ma <begeekmyfriend@gmail.com>
Delete unnecessary modules.

Signed-off-by: leo-ma <begeekmyfriend@gmail.com>
Merge pull request #1 from leo-ma/package-smartsnmpd

Improved package smartsnmpd for OpenWrt, impl real interface MIBs for OpenWRT.

Read device data from ubus network.device status.