[CHANGE] use eth0 ip if eth0 ip is private by default;
[CHANGE] rubocop compliance;
Merge pull request #96 from Bigpoint/ipsearch

Ipsearch
Merge remote-tracking branch 'remotes/origin/next'

* remotes/origin/next:
  [CHANGE] rubocop compliance;
  [CHANGE] use eth0 ip if eth0 ip is private by default;
increase version number to 0.1.109