a SURPRISE new partnership has been formed involving Scottish Enterprise, the City of Edinburgh Council and Forth Ports to turn the capital's docks into a hub for renewable energy manufacturing.  a new Memorandum of Understanding has been formed between the group to develop an ambitious new masterplan to create a "21st-century gateway port" at Leith.  The partnership means previous plans to build 15,000 new houses and a shopping esplanade have been torn up in favour of "reshaping the vision" to focus on turbine manufacture.  It is not yet known how much public money will be ploughed into the new initiative, but Scottish Enterprise has confirmed it will fund technical and feasibility studies that will form the basis for future plans. a spokeswoman could not confirm how much money this would involve.  First Minister alex Salmond said: "This agreement signals the dawn of a new era for Leith, which will ensure it plays a central role in supporting economic growth in the Lothians and in the wider Scottish economy.  Forth Ports chief executive Charles Hammond told The Scotsman: "This is a new direction that we are going in. It's something that we have been pursuing for a while.  "We believe the best commercial direction and