Add release generator batch file for windows

[mike2718]

Similar with mk_release.sh

[igelbox]

• need more formatting, e.g. (tab-s are allowed too):

echo ^<User "anonymous"^> >> %DIST%\slimftpd.conf
echo ^    Mount / .       >> %DIST%\slimftpd.conf

• highlight VERSION variable (add empty lines (as in mk_release.sh))
• use cmd extension (it looks more pretty)
• replace my mk_release.sh with your mk_release.cmd (because: binary - for win, project - for VS => therefore .sh - not need more)
• try to call rmdir /s /q dist before mkdir ... to avoid 'already exists' warning
• try to introduce DIST variable, e.g.:

set DIST=dist\SlimFTPd
mkdir %DIST%
copy /y SlimFTPd.exe %DIST%\

[mike2718]

@igelbox I am trying to use awk.exe to get version number from SlimFTPd.rc.

-> http://cm.bell-labs.com/cm/cs/awkbook/index.html

[igelbox]

• we can do it without awk, e.g.:

for /f "tokens=3" %%a in ('findstr ProductVersion src\SlimFTPd.rc') do (set VERSION=%%a)
set VERSION=%VERSION:"=%

then VERSION.txt is redundant

• del /f /q %NAME%\* is redundant
• missing word 'SNAPSHOT' in the version string (should be: 3.19-SNAPSHOT)
• you need to make a separate pull-request for MSVC12 (not need for separate 'msvc12' folder, just replace old VS2008 project/solution files with your new files (today, anyone can free download VS2013-express))

[igelbox]

I fixed and merged your commit dc2d02f763458c1813cd8095e4065d1fdec35449 into the master branch