Escape

• View helpers were not calling the escape helpers

Bootstrap 4 Navbar

• Added a Bootstrap 4 navbar view helper

Badge and Label

• Added Bootstrap 3 badge view helper
• Added Bootstrap 3 label view helper
• Added Bootstrap 4 badge view helper
• Minor fixes

Button 3 Button

• Added Bootstrap 3 button view helper
• customClass() method was incorrectly private

Bootstrap 4 button

• Added Bootstrap 4 button view helper.

Icons

• Icons missing from README

Initial release

• Added Bootstrap 3 Jumbotron view helper.
• Added Bootstrap 4 Jumbotron view helper.