Minor fixes to the LUWRAIN API

Renaming the package org.luwrain.template to org.luwrain.app.base

Renaming the package org.luwrain.template to org.luwrain.app.base

Updates in LUWRAIN API

New TreeArea interface

Renaming Area.onKeyboardEvent() to onInputEvent()

Fix to EditArea construction

Compilation fixes

New TreeArea interface

Minor fix:Calling SImpleArea.setLines() directly