Improved API and switched to Swift 4.1

3.1.0

Improved API and switched to Swift 4.1.

v.2.3

Renamed project, moved under another account, wrote Readme.

v.2.2

Got rid of custom mutation control.

v.2.1

Added multi-step validation support.

Also:

• improved unit tests (they serve like example of usage as well);
• minor improvements in code formatting.

v.2.0

‘ValueWrapper’ became a struct, not a class anymore.

v.1.1

Slightly improved API + minor bug fixes.

v.1.0 - Initial release

1.0.0

Initial release