Laurence “Lo” Toney has been named CEO of LearnStreet, the Palo Alto-based startup that’s helping aspiring computer scientists to learn how to code online. Toney is one of the many Zynga employees who have left the games company over the past few months. In October, he stepped down after working there for three years, most of that time as the general manager of Zynga Poker. “It’s hard to imagine being at a big company now, like Zynga, now that I’m at a small company,” said Toney, after only five weeks on the job.