VS2012 Changes, C++0x

- std::tr1::shared_ptr is now under <memory> in the std namespace. Made
changes to pointer_types.h to reflect this.
- The project will now look for the following environmental variables:
LIB_INCLUDES and BOOST_LIB; exampels of these can be found in the
Readme.txt file.
- Changed the platform toolset from W7.1SDK to VS2012(v110).