[PATCH] Update for Visual Studio 2010 project files

[eipi]

Hi,

I made a small patch regarding the VS2010 project files. Previously, VS2010 was unable to locate the project file.
I also added a library path to the project file so that Simutrans should compile right out of the box if you've got the necessary external libraries in the lib subfolder

[eipi]

Another update...
I did not want to start a new thread because of this, so I put it here.

Changelog:

1.   libraries are now taken from ./libs and include files from ./libs/inc in Release configuration, too (forgot that last time)
2.   New folder ./libs with subfolder inc
3.   Added csv.h and csv.cc to the project file
4.   Changed executable Output Directory to ./simutrans in both configurations
5.   Changed executable name in Debug and Release to simutrans-trunk and simutrans-trunk-release, respectively
6.   Disabled Incremental Linking because it is ignored anyway due to Link Time Code Generation