Visual D v0.3.39 beta 2

Some mago fixes:

• fix section offset/length being limited to 16-bit
• fix reference counting for some DIA objects
• support CV_ALLREG_VFRAME as a register (EBP/RBP)
• Locals: only display data symbols (e.g. no typedefs)
• 2014/8/6: fix support for VS versions 2012 and earlier
• 2014/8/8: improve performance of binding line numbers to code location