Two way name application.
Fix compile warnings on VS2013 (mainly size_t -> unsigned).
Enable precompiled headers and multi-processor compilation. Much faster!
Replace hard-coded /tmp paths with call to boost::filesystem::temp_directory_path()
Rename Ethereum.exe output to eth.exe
Specify ETH_VERSION, ETH_BUILD_PLATFORM and ETH_BUILD_TYPE in common property sheet. Isn't ideal but we're not using cmake (yet) for VS 2013.