Merge pull request #206 from maksimov/develop

Develop
Add VisibleScope to firewall
Merge pull request #208 from andylyall/develop

Add VisibleScope to firewall
Merge pull request #210 from maksimov/develop

Changed interval and timeout to type int (seconds), added javadoc.
Removed incorrect annotations
Merge branch 'develop' of github.com:maksimov/dasein-cloud-core into develop