* Improve encapsulation on Whitelist
* remove only
* update whitelisted crowdsale test
* Improve encapsulation on SignatureBouncer
* fix missing test
* Improve encapsulation on RBAC example
* Improve encapsulation on RBAC example
* Remove extra visibility
* Improve encapsulation on ERC20 Mintable
* Improve encapsulation on Superuser
* fix lint
* add missing constant
* Add a leading underscore to internal and private functions.
Fixes#1176
* Remove super
* update the ERC721 changes
* add missing underscore after merge
* Fix mock
* Refactoring Superuser contract to allow Owners to transfer ownership when they are not superusers #50
* Refactoring tests to create a contract instance for each of them #50