Like any year in the auto industry, 2012 saw its fair share of company ups and downs, industrial comings and goings, and a fair old sprinkling of corporate drama. It was also a year of economic uncertainty hovering over automotive markets. We covered it all on just-auto. Editor Dave Leggett sifts through the lot and picks out a few highlights from the year just gone, month by month. Part one covers the first half of the year, part two the second. This is part one.