Add plugin to open the current file in Visual Studio

Works better than visual_studio plugin (which isn't working for me at
all right now).
Add template for building msbuild projects

You probably won't use this directly. Just copy it to your
company-specific bundle.
vshelp: use sfile to guess the script's location

Trick I found in speeddating: sfile gives the file being sourced
(vshelp.vim in this case), so we can trim off the filename and plugin
directory to get either the bundle dir or the vim root (or something
else crazy). So long as it's not too crazy, this should work.

Don't expose vshelp_devenv. Switch from global to script-local variable.

Fail if we can't find the script. We can't do much without it.
Use AsyncCommand to OpenInVisualStudio

If AsyncCommand is available, then open visual studio asynchronously.
Add trick to convert registers to pointers

Add Visual Studio trick to make it easier to guess pointers from the
register window. Useful when debugging Release builds where Visual
Studio won't do it for you itself. Result is a list of possible
candidates (currently only works for x86_64).

Made it an autoload function with no command because it's infrequently
used.
vshelp: Upgrade to Visual Studio 2012

Change versions used by vshelp to Visual Studio 2012
Use \r to insert a newline in :substitute

Using a ^M can do weird things with line handling, so use the escape
sequence instead.