Antform 1.4.6beta2 released

Here is what was changed since 1.4.2:
. New table attribute: bestFitColumns
. Add tooltips
. New checkSelectionproperty and radioSelectionProperty attributes: 'columns'
. Hide ok, reset or cancel button when label is empty.
. 'background' attribute for links (experimental)
. It is now possible to use custom widgets. Such widgets must extend com.sardak.antform.types.BaseType
. The properties save feature keeps the original property file layout and content
. Form properties are now saved in the ant project before link invocation
. Fixed bug: properties were saved when clicking cancel
. Several bug fixes and cleanup