* rename proposals directory to drafts directory
* move TokenVesting and SignatureBouncer to drafts/
* rename BouncerMock.sol to SignatureBouncerMock.sol
* Add a leading underscore to internal and private functions.
Fixes#1176
* Remove super
* update the ERC721 changes
* add missing underscore after merge
* Fix mock
* fixed visibility warnings
* solved visibility and line length warning
* change a test assertion that fails due to chai dependence update
* linter, constructor style and solved visibility warnings
* Changed Windows line endings to Unix.