Ben Horowitz, co-founder of Andreessen Horowitz, talks about Skype Technologies SA’s employee stock-option plan and the dismissal of senior executives before the completion of Microsoft Corp.'s takeover of the company.   The timing of the firings means stock options will be worth less than if the executives stayed until the closing of the $8.5 billion deal. Horowitz speaks with Cory Johnson at the Allen & Co. conference in Sun Valley, Idaho, on Bloomberg Television's "Bloomberg West."