build: Added Visual Studio project file generator

Added a batch file for generating the Visual Studio project files from
the new template files.

projects/generate.bat

+@echo off
+rem ***************************************************************************
+rem *                                  _   _ ____  _
+rem *  Project                     ___| | | |  _ \| |
+rem *                             / __| | | | |_) | |
+rem *                            | (__| |_| |  _ <| |___
+rem *                             \___|\___/|_| \_\_____|
+rem *
+rem * Copyright (C) 2014, Steve Holme, <steve_holme@hotmail.com>
+rem *
+rem * This software is licensed as described in the file COPYING, which
+rem * you should have received as part of this distribution. The terms
+rem * are also available at http://curl.haxx.se/docs/copyright.html.
+rem *
+rem * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+rem * copies of the Software, and permit persons to whom the Software is
+rem * furnished to do so, under the terms of the COPYING file.
+rem *
+rem * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+rem * KIND, either express or implied.
+rem *
+rem ***************************************************************************
+
+rem Generate VC8 project files
+call :generate Windows\VC8\src\curlsrc.tmpl Windows\VC8\src\curlsrc.vcproj
+call :generate Windows\VC8\lib\libcurl.tmpl Windows\VC8\lib\libcurl.vcproj
+
+goto exit
+
+rem Main generate function.
+rem
+rem %1 - Input template file
+rem %2 - Output project file
+rem
+:generate
+  echo.
+
+  if not exist %1 (
+    echo Error: Cannot open %CD%\%1
+    exit /B
+  )
+
+  if exist %2 (  
+    echo Deleting %2
+    del %2
+  )
+
+  echo Generating %2
+  for /f "delims=" %%i in (%1) do (
+    if "%%i" == "CURL_SRC_C_FILES" (
+      for /f %%c in ('dir /b ..\src\*.c') do call :element src %%c %2
+    ) else if "%%i" == "CURL_SRC_H_FILES" (
+      for /f %%h in ('dir /b ..\src\*.h') do call :element src %%h %2
+    ) else if "%%i" == "CURL_SRC_RC_FILES" (
+      for /f %%r in ('dir /b ..\src\*.rc') do call :element src %%r %2
+    ) else if "%%i" == "CURL_LIB_C_FILES" (
+      for /f %%c in ('dir /b ..\lib\*.c') do call :element lib %%c %2
+    ) else if "%%i" == "CURL_LIB_H_FILES" (
+      for /f %%h in ('dir /b ..\lib\*.h') do call :element lib %%h %2
+    ) else if "%%i" == "CURL_LIB_RC_FILES" (
+      for /f %%r in ('dir /b ..\lib\*.rc') do call :element lib %%r %2
+    ) else if "%%i" == "CURL_LIB_VTLS_C_FILES" (
+      for /f %%c in ('dir /b ..\lib\vtls\*.c') do call :element lib\vtls %%c %2
+    ) else if "%%i" == "CURL_LIB_VTLS_H_FILES" (
+      for /f %%h in ('dir /b ..\lib\vtls\*.h') do call :element lib\vtls %%h %2
+    ) else (
+      echo %%i>> %2
+    )
+  )
+  exit /B
+
+rem Generates a single file xml element.
+rem
+rem %1 - Directory (eg src, lib or lib\vtls)
+rem %2 - Source filename
+rem %3 - Output project file
+rem
+:element
+  if "%1" == "lib\vtls" (
+    set "TABS=        "
+  ) else (
+    set "TABS=      "
+  )
+  echo %TABS%^<File>> %3
+  echo %TABS%  RelativePath="..\..\..\..\%1\%2">> %3
+  echo %TABS%^>>> %3
+  echo %TABS%^</File^>>> %3
+  exit /B
+
+:exit
+  echo.
+  pause