MSVC 2008 Projects: Use Custom Build Rules

...for all of the copying of the pre-configured headers for Cogl.  This
makes it much easier for people using the projects for building Cogl to
clean up files that are "generated", and this commit is the last bit for
it.  Also clean up the property sheets as a result.

Also fix the Cogl project that it does indeed look for headers in
cogl/deprecated, so that the build is fixed.

Similar updates to the Visual Studio 2010 Projects will follow.
Update Visual Studio 2008 Solution File

Combine the parts to build Cogl with SDL support into a single solution
file, so to ease future maintenance.
build/win32/vs9/cogl.vcprojin: Use SDL 2.x for SDL Support

As SDL-2.x has been officially released for a while, update the Visual
Studio 2008 projects to build and link against the SDL-2.x libraries.
Fix Conformance Test MSVC 2008 Project

Don't define COGL_COMPILATION when we build the conformance tests.
MSVC 2008 Projects: Build cogl-path as a DLL

So that it will be like what is done in the autotools builds now.  Also
clean up the cogl-path and cogl-pango projects.
build/win32/vs9/cogl.vsprops: Update Header Installation

Update the headers "installation" as some headers have been made
deprecated.
MSVC 2008 Builds: Build the SDL-2.x example

...instead of the SDL-1.x example.  The SDL-1.x example is not going to run
well against Cogl built against SDL-2.x.
MSVC 2008 Builds: Link Conformance Test to cogl-path

We need to link the conformance test executable to cogl-path, so make that
project depend on the cogl-path project, so that it will link to it as
well.
MSVC 2008 Builds: Split Up the Property Sheets

Split up the property sheets, so that it is easier to maintain, and update
the project files accordingly.  Also clean up the project files by
finishing up the merge of the *_sdl.vcproj items into their regular
counterparts, and dropping all the *_sdl.* files.

Make use of UNIX line endings for all the MSVC 2008 build files, except the
.sln file and the README.txt files, for easier maintenance.
build/win32/vs9/cogl.sln: Update

Make the install project depend on cogl-path, so that we are certain that
the cogl-path DLL gets "installed".
Update the Visual Studio 2010 Projects

This updates the Visual Studio 2010 Projects in the following ways,
similar to the recent changes to the Visual Studio 2008 projects:

-Make all the copying of the pre-configured header files custom build
 rules, so that it is cleaner when people clean their builds, and the files
 can be re-copied when updated.
-Split up the property sheets, so to ease future maintenance
-Make the cogl-path library built as a DLL
-Build and link against SDL-2.x for SDL builds
-Make everything except the .sln file and the README.txt file use UNIX line
 endings, for easier maintenance.
-Merge cogl_sdl.sln and install-sdl.vcxproj into cogl.sln and
 install.vcxproj respectively.
-Update build of the conformance test to not use COGL_COMPILATION, and make
 it link to cogl-path.