message: add a pointer to Visual C++ Redistributable
diff: @@ -46,6 +46,6 @@ Building the PCM Tools
  - Linux: just type 'make'. You will get all the utilities (pcm.x, pcm-memory.x, etc) built in the main PCM directory.
  - FreeBSD/DragonFlyBSD: just type 'gmake'. You will get all the utilities (pcm.x, pcm-memory.x, etc) built in the main PCM directory. If the 'gmake' command is not available, you need to install GNU make from ports (for example with 'pkg install gmake').
  -- Windows: follow the steps in [WINDOWS_HOWTO.rtf](https://github.com/opcm/pcm/blob/master/WINDOWS_HOWTO.rtf) (will will need to build or download additional drivers). You can also download PCM binaries from appveyor build service (https://ci.appveyor.com/project/opcm/pcm/build/artifacts).
  +- Windows: follow the steps in [WINDOWS_HOWTO.rtf](https://github.com/opcm/pcm/blob/master/WINDOWS_HOWTO.rtf) (will will need to build or download additional drivers). You can also download PCM binaries from [appveyor build service] (https://ci.appveyor.com/project/opcm/pcm/build/artifacts) and required Visual C++ Redistributable from [www.microsoft.com](https://www.microsoft.com/en-us/download/details.aspx?id=48145).
  - Mac OS X: follow instructions in [MAC_HOWTO.txt](https://github.com/opcm/pcm/blob/master/MAC_HOWTO.txt)
  