Wannabe developers on Codecademy are getting even more opportunities to build virtual tools. Last month, the New York-based learn-to-code startup launched a new track of lessons on using APIs (application programming interfaces) with partners like YouTube (s GOOG), NPR, SoundCloud and others.  On Tuesday, Codecademy said that it had added another set of lessons through partnerships with 14 companies, including Twitter, Gilt Groupe and Box.