Combine all the different configurations together so the project files
are more generic and maintainable.
Also standardise the layout so all the project files will be similar and
all have the same standard elements (even if empty).
Add 64-bit configurations.
Additional specifics:
wxWidgets: Common stuff into the property sheets.
pthreads: Fixes the LNK4068 warning.
portaudio: Devel config added.
libjpeg: Non-existent file removed.
Side note: libjpeg is barely used - wxWidgets uses it but doesn't have
to, ZeroGS uses it but we don't develop that anymore.
The *null projects don't build, and neither do ZZOgl or ZeroSPU2.
Pcsx2 project has some issues with Resources' custom build steps not being run.
Only Debug target tested.
Needs work before it's usable.
git-svn-id: http://pcsx2.googlecode.com/svn/trunk@2843 96395faa-99c1-11dd-bbfe-3dabce05a288