Version 1.1.1

Tested with WordPress 4.5.

Version 1.1

Integrated custom CSS class, containing the original form ID for easy styling.
Integrated a tests framework.
Added a complete set of unit tests to reach 98% test coverage.
Improved code and made it compatible with the WordPress Coding Standards.
Minor replacement fix.
Readme improvements.
Integrated Travis CI and Scrutinizer CI.

Version 1.0.15

Added support for the page "Next" button conditional logic.

Version 1.0.14

Added support for all product field types.

Version 1.0.13

Added support for Product field with Calculation field type.

Version 1.0.12

Properly sanitizing the random form ID. Props @swissspidy.

Version 1.0.11

Tested with WordPress 4.4.

Version 1.0.10

Now properly supporting date field with calendar enabled.

Version 1.0.9

Now properly supporting maximum characters limit.

Version 1.0.8

Supporting WordPress 4.3.
Properly supporting gform_field_values.