0.12.0

• Added BootstrapVersion enum
• Added size, lg and sm properties to buttons
• Added hide-text property to buttons for future features...
• Added new "Action buttons" components:
  • Preview button
  • Move up button
  • Move down button
  • Enable button
  • Disable button
  • Enabled button
  • Disabled button
• Renamed button.blade.php views to simple-button.blade.php
• Rewrote all button component class constructor signatures
• Replaced the native PHP function ucfirst() with the Laravel method Str::ucfirst() to support multi-byte strings

Full Changelog: 0.11.1...0.12.0