Add and use port configuration

Needs https://github.com/openl10n/openl10n-sdk/pull/4 to be merged

This commit has been squashed:
- d05dcb8 Fix PSR-2 compliance in file
Explicit README
Clean code

According the Insight report at
https://insight.sensiolabs.com/projects/c5beb956-9b80-49c1-b3fe-d4b4a49aa06f/analyses/1
PSR-2 compliant