WIP: Mikolai / Jexcel Editor
added erp5_jexcel_editor bt : editor gadget and jexcel/jsuites sources added erp5_jexcel_editor_test bt: test for jexcel editor bt
added erp5_jexcel_editor bt : editor gadget and jexcel/jsuites sources added erp5_jexcel_editor_test bt: test for jexcel editor bt