Build fix (Windows).

Os::info, Os::nonFatal where missing. Os::fatal was wrongly used.
Do not build android on Debug|Win32
Windows installer build fix (only sln file knows about configurations + va_copy does not exist in VC++).
Remove unused toolbar. Remove not needed registry settings from installer.
QTCopy: copy debug Qt dlls in debug builds.
Fix error message (not always OpenGL32.dll!)