Associated Press: Homebuilders slapped on solar panels and added other eco-friendly enhancements as energy prices soared this year, hoping greener homes would lure reluctant buyers. But since July, the cost of oil has plunged from $147 a barrel to about $36, while home prices continued to fall. Together, these headwinds have stalled low-energy housing developments around the country, including projects by Meritage Homes and Shea Homes. “The program doesn’t necessarily pencil out at the moment,” …