Locate breakpad libraries via $(PlatformToolset)

* This means people building on VS2013 don't need to rebuild breakpad
  locally to link successfully.
* Committed binaries built on VS2012 Update 4 and VS Express 2013 for
  Desktop, which will hopefully work for everyone.
Fix winsock deprecation warning on inet_addr

* It appeared suspiciously after I installed VS2013 Update 3, even when
  compiling on VS2010...