Add "foundations.common.getHostAddress" definition and related units tests.
Add "foundations.exceptions.ExecutionError" class.
Handle non existing files and directories in "foundations.pkzip.Pkzip.extract" method.

Closes #10.
Handle "socket" module related exceptions in "foundations.common.isInternetAvailable" definition.

Closes #11.
Change copyrights dates.
Increase timeout in "foundations.common.isInternetAvailable" definition.
Change default check ip address in "foundations.common" module.
Raise package release version number to "2.0.7".
Update "CHANGES.rst" file.
Update documentation / help files.
Merge branch 'feature/v2.0.7' into develop