Disable macro redefinition warnings.

This commit disables the following warnings:

  9>c:\program files (x86)\microsoft sdks\windows\v7.0a\include\intsafe.h(144): warning C4005: 'INT8_MIN' : macro redefinition
  9>          c:\program files (x86)\microsoft visual studio 10.0\vc\include\stdint.h(72) : see previous definition of 'INT8_MIN'
  9>c:\program files (x86)\microsoft sdks\windows\v7.0a\include\intsafe.h(146): warning C4005: 'INT16_MIN' : macro redefinition
  9>          c:\program files (x86)\microsoft visual studio 10.0\vc\include\stdint.h(73) : see previous definition of 'INT16_MIN'
  9>c:\program files (x86)\microsoft sdks\windows\v7.0a\include\intsafe.h(148): warning C4005: 'INT32_MIN' : macro redefinition
  9>          c:\program files (x86)\microsoft visual studio 10.0\vc\include\stdint.h(74) : see previous definition of 'INT32_MIN'
  9>c:\program files (x86)\microsoft sdks\windows\v7.0a\include\intsafe.h(152): warning C4005: 'INT64_MIN' : macro redefinition
  9>          c:\program files (x86)\microsoft visual studio 10.0\vc\include\stdint.h(149) : see previous definition of 'INT64_MIN'

which come from system headers when Caspar is compiled with
VS Express 2010.
Allow VS project file to be opened with VS Express 2010.

CasparCG VS project file was saved with newer Visual Studio version
which prevents VS Express 2010 from opening it. Since VS Express 2010
is still listed as the version that should be used to compile Caspar
with this needs fixing.
Add WinDDK lib and include paths where needed.

Add WinDDK include directory to the list of include dirs for decklink,
flash and shell modules which otherwise can't find atlbase.h

Also add winddk lib dir to shell, because it needs it for successful
linking.
shell.rc: Replace afxres.h include with windows.h

Without this the build fails.