Implemented the override feature for BaasBox settings
Settings overridden are not-editable by default
Console update to manage the overridden settings
test for overridden settings
Merge pull request #18 from baasbox/master

update from origin
Override app settings stored into the embedded DB #fixed 270
Merge pull request #271 from giastfader/master

Override app settings stored into the embedded DB - Closed #270