[msvc] Add win64 configuration

solution and project files are upgraded to VS2013 format
[msvc] Customize the stack size

Or it crashes in a lot of cases when running rebol-test

The size comes from the mingw makefile
Do not use the system qsort

The implementation varies on different platforms (it seems to be stable
sort on Linux, while unstable on Windows).

sort ["a" "A"] gives different result on these platforms when using the
system qsort

Rename it to reb_qsort to avoid conflict when linking. It seems to be
easy to redefine the system function, but not as easy for visual studio.
As its usage is quite limited, it's easier to rename it.
[msvc] Compile f-qsort.c
Chnage mode
Enable #[datatype] constructor for struct! and routine!

callback! needs an alias MT_Callback to MT_Routine to make it work, so
it's not enabled yet.
Fix crash in enline

demo'ed by this code:
>> enline "^/a^/b"

This fixes https://github.com/zsx/r3/issues/16
Check the prior character for CR in Enline_Uni
CALL with IO redirection

Only implemented on Linux for now.
Implement a R2-like non-blocking CALL
Set cmd to NULL when it's passed via argv

Windows needs to assembly the command line from argv in this case
Set output/error to none when it's not available

instead of undefined, such that the script can easily test its value.
[Win32] Initial implementation of CALL

I/O redirection is working, and the CALL can be asynchronous when no I/O
is redirected.

The only thing that's not implemented is accepting a BLOCK or FILE as
the parameter to CALL
[Win32] Always close handles

Such that the handles will not be leaked.
[Win32] Fix size related parameters
[Win32] Try to kill subprocess in case of error

Make it in line with Linux implementation
Rename OS_Wait_Process to OS_Reap_Process

As reaping the child process is the real purpose. This makes it easier
to be implemented on Windows
[Win32] Convert child process input to OEM

This has been tested to be working with:
>> call/input "cmd.exe" "dir^/"
Merge branch 'atronix' into call
[Linux] Make sure memory is free'd

Memory could leak if output/error reading failed