fix building of wkhtmltopdf on windows with MSVC 2010

This patch set fixes building of wkhtmltopdf on windows with MSVC 2010, along with proper generation of version information in the executables/libraries.

To test this, the following instructions can be used:

* Follow instructions at http://qt-project.org/wiki/Category:Tools::msvc for installation of MSVC 2010
* Update all related patches from Windows Update to ensure that latest VC/SDK is installed
* Install Strawberry Perl (required for compilation of OpenSSL and Qt)
* Compile OpenSSL using the instructions from the Windows section at http://phantomjs.org/build.html
* Check out https://qt.gitorious.org/qt/ashkulz-qt and switch to the 4.8.5 branch
* Use batch file given at https://gist.github.com/ashkulz/8041028 for compilation of custom QT
* Switch to the wkhtmltopdf folder and run the following commands:
  * `<custom-qt-folder>\bin\qmake`
  * `nmake`