ATX Television Festival's seventh annual Pitch Competition has issued a call for submissions, and has a new wrinkle – sponsored transportation and accommodations for its Top 10 finalists. The event, being held June 6-9 in Austin, Texas, provides an opportunity for undiscovered writers to showcase their talent, along with providing access to TV's top decision-makers. ATX's focus is the celebration of the television medium – looking back at its history, where it is now, and…