Merge pull request safe-global#308 from gnosis/changelog_update

Update GnosisSafe address

Merge pull request safe-global#220 from gnosis/remove_zos_folder

Remove openzeppelin folder

Release dev.2

1.1.1-dev.1

Merge pull request safe-global#160 from gnosis/deploy_1_1_1

Closes safe-global#159: Deploy Version 1.1.1 contracts

1.1.0

1.0.0

Merge pull request safe-global#82 from gnosis/disable_optimizer

Disable optimizer

Merge pull request safe-global#77 from gnosis/feature/issue_76

Closes safe-global#76: Use SafeMath for refund calculations

Merge pull request safe-global#71 from gnosis/feature/patch_0_0_2

Update master copy