Ideal staging branch v2.062-b1 for dlang.org

Current [dmd2beta.zip](http://ftp.digitalmars.com/dmd2beta.zip) might be created at 2013/02/08, so I merged current master head (20152e47f2651308268eec487c697769a96c7e9a) into 'staging' branch.

(Unfortunately, the contained html files in [dmd2beta.zip](http://ftp.digitalmars.com/dmd2beta.zip) is much different from current master products. I doubt that it is correctly updated...)

This pull request imports all changes (current 'staging' head (19055d7fa53d1c8efffbcf907974ab2db41b26c7) to 20152e47f2651308268eec487c697769a96c7e9a) into 'staging' branch.