Added WinPcap to the library of 3rd party includes and made DEV9ghzdrk use them.
WinPcap version is 4.1.2 and only the /include and /lib folders of their developer pack are included.

git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5599 96395faa-99c1-11dd-bbfe-3dabce05a288
DEV9ghzdrk: Re-enabled the stack init hack, fixing GT4 network use.

git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5600 96395faa-99c1-11dd-bbfe-3dabce05a288
DEV9ghzdrk: 
Changed the stack init hack so it is consistent on plugin resets and removed a part of it that broke OPL.
Hopefully this works for all use cases, but we should fix the initial problem anyway.

git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5601 96395faa-99c1-11dd-bbfe-3dabce05a288
Added Visual Studio 2012 solution files for DEV9ghzdrk and avoided a macro redefinition error in WinPcap when that compiler is used.
VS2008 is harder to do as there is no automatic downgrader tools for the solution files, sorry.

git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5602 96395faa-99c1-11dd-bbfe-3dabce05a288