try fix bug

code refactor

DB directory tests (#6)

* working on develop branch

* bug in test path db fixed

* more tests in db path

* coverage goes to 77

code refactored, version 0.4.x

test coverage added, some tests added

Merge branch 'master' of github.com:ah8ad3/gateway

Update .travis.yml

some tests added

some tests added

Merge branch 'master' of github.com:ah8ad3/gateway