Add VS2012 Solution File
Add VS2012 Solution File

After the next release is finalized, we can make the VS2010 solution the
primary.

compborg/dockpanelsuite,xo-energy/dockpanelsuite,15070217668/dockpanelsuite,transistor1/dockpanelsuite,15070217668/dockpanelsuite,rohitlodha/dockpanelsuite,dockpanelsuite/dockpanelsuite,elnomade/dockpanelsuite,joelbyren/dockpanelsuite,Romout/dockpanelsuite,angelapper/dockpanelsuite,thijse/dockpanelsuite,ArsenShnurkov/dockpanelsuite,jorik041/dockpanelsuite,shintadono/dockpanelsuite,RadarNyan/dockpanelsuite