Clues hidden within webcam images were a crucial advantage for a meteorologist-turned-treasure-hunter who cracked the mystery of Project Skydrop on Tuesday and found the golden prize hidden in a Massachusetts forest.Dan Leonard said that once he heard about the contest last month, he was hooked. “Ironically, it was a Channel 5 news (WCVB) story that showed up on my phone, and I, like everybody else, read it and was (in) disbelief. Wow, this is the coolest thing I’ve ever heard,” he said. Project Skydrop was the creation of New Hampshire-based game designer Jason Rohrer and California-based Tom Bailey.Every day, a map on their website was updated with a narrower circle indicating the possible area where the treasure may be hidden. It began at 500 miles in diameter, stretching from western Pennsylvania to Cape Cod, but shrank over 12 days to encompass an area of Western Massachusetts. Leonard said he used …