JQMFieldContainer: setLabelHidden() added. 
JQMRadioset, JQMSelect, JQMText are descendants of JQMFieldContainer
now.
Merge pull request #62 from slavap/master

JQMFieldContainer: setLabelHidden() added. JQMRadioset, JQMSelect, JQMText are descendants of JQMFieldContainer now.
Merge pull request #61 from gboros/master

use default page transition from JQM
Toolbar with indirectly descendant buttons is fixed. For example:
JQMHeader -> JQMTable -> FlowPanel -> buttons.
Html.Div added for better semantical representation in some cases.
ImageLinkButton added.
Some code re-factoring, common code moved to JQMCommon.
isVisible() / isHidden() added to Mobile and JQMCommon, it's more
reliable than GWT Widget.isVisible().
Mobile.isVisible()/isHidden() test added.
JQMPage.onPageInit() added.
JQMCalBox: useClearButton added; value can be set right from UiBinder
ui.xml templates.
isVisible() improved for JQMWidget and JQMContainer.
JQMPage.centerContent() is public now.
JQMListItem - text is optional now.
JQMListItem - setCheckBox(IconPos iconPos) added, so it's possible to
select JQMList rows with checkboxes now.
JQMCheckbox - setCorners() and setIconPos() added.
JQMList - recreate() added.
JQMListItem.setChecked() added.
JQMList/JQMListItem - split button support added; 
control group mode added - any widgets can be added to list item.
JQM component event basics + "tap".

Added support for "tap" JQM event
(http://api.jquerymobile.com/category/events/) wherever there was
support for click implemented in JQM4GWT. "taphold" is implemented but
not added to any widget.

Other event types need to be added as well (should be easy now); maybe
it would be a good idea to add all those at JQMWidget level - as JQM
doesn't specify each event for what widget is meant...
Added a 'tap' button to the event examples.
Advanced Lists - "Add more text" fixed.