Add SimpleCheckBox and SimpleRadioButton
Merge pull request #224 from ArloL/simple-checkbox

Add SimpleCheckBox and SimpleRadioButton
Add bootstrap version of FocusWidget
Add bootstrap version of ButtonBase
Add bootstrap version of Widget
Move base classes to org.gwtbootstrap.client.ui.gwt
Merge pull request #225 from ArloL/base-classes

Add bootstrap versions of some GWT base classes
Fire ValueChangeEvents only if necessary
Add comment explaining empty method
Merge pull request #226 from ArloL/simple-radio-button-value-change

Fire ValueChangeEvents only if necessary
Correct check box and radio button implementations; fixes #216
Fix license headers
Add a base GWT module
Add IE 8 specific SimpleCheckBox implementation
Add IE 8 specific SimpleRadioButton implementation
Inherit UserAgent module
Set test mode to htmlunit by default
Add a simple test of CheckBoxButton
Add a base GWTTestCase
Add a base test class for input based buttons that can be used in toggle groups