JQMList/JQMListItem - split button support added; 
control group mode added - any widgets can be added to list item.
Advanced Lists - "Add more text" fixed.
DataIcon - CUSTOM and NONE added.
JQMToolbar - HasWidgets implemented; activateClickHandlers() improved to
process HasOneWidget.
JQMListItem.getWidgetCount() and getWidget(int index) added.
Merged some root repo commits that had merge conflicts - specially on
list item.

List item was able to contain other widgets, but event handlers would
not work on them. Added the components in logical GWT hierarchy as well.
Now events should work on child components.

Refactored the newly added JQM events to allow some native access to the
jQuery event object, only add one listener in case of multiple handlers
+ not stop propagation and default value always (for tap/vclick + page
switch problem) to allow bubbling & other listeners if someone else adds
them natively.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	examples/src/main/java/com/sksamuel/jqm4gwt/examples/lists/ListViewDemoPage.java
	examples/src/main/java/com/sksamuel/jqm4gwt/examples/uibinder/TestView1.java
	examples/src/main/resources/com/sksamuel/jqm4gwt/examples/uibinder/TestView1.ui.xml
	library/src/main/java/com/sksamuel/jqm4gwt/JQMCommon.java
	library/src/main/java/com/sksamuel/jqm4gwt/list/JQMList.java
	library/src/main/java/com/sksamuel/jqm4gwt/list/JQMListItem.java
	library/src/main/java/com/sksamuel/jqm4gwt/toolbar/JQMToolbar.java