added additional library search paths to find bullet

This allowed CMake to correctly build Visual Studio 2010 project files against a windows compiled version of bullet (2.81 rev 2613)
added missing reference to <cctype>

added missing reference to <cctype> that was causing Visual Studio 2010
to fail to compile stringops.hpp
added hack to fix an alignment issue in MSVC 2010

The default allocator in Visual Studio 2010 does not respect the
alignment requirements of classes it is allocating memory for. This
results in a potential crash when using OEngine::Physics::PhysicActor
that has been allocated on the heap if it is built against a version of
Bullet that has SSE intrinsics enabled.
replaced std::string concatenation with std::ostringstream

Changed a block of code that was performing a series of string
concatenations to use an ostringstream instead. This allowed the removal
of calls to std::to_string (not C++03 compliant) and fixes an compile
error in MSVC 2010 (ambigous overload when calling std::to_string).
Merge remote-tracking branch 'blunted2night/msvcbuild'