Change object.keys to ie8 compatible for..in solution
Change object.keys to ie8 compatible for..in solution

Fix concern fafabbb4263f29b7313cae148e5450a16f8cac09
Auditors: niko

darimpulso/koala-framework,nsams/koala-framework,Ben-Ho/koala-framework,Sogl/koala-framework,darimpulso/koala-framework,kaufmo/koala-framework,kaufmo/koala-framework,yacon/koala-framework,nsams/koala-framework,koala-framework/koala-framework,Ben-Ho/koala-framework,nsams/koala-framework,koala-framework/koala-framework,yacon/koala-framework,kaufmo/koala-framework,Sogl/koala-framework,yacon/koala-framework