Fix windows builds
* Only define true/false and typedef char bool on Windows when no building using
  C++ and true isn't defined.  On all other platforms just use stdbool.h.
* create a typedef for mode_t when on Windows
* Only include platform.h on non-Windows platforms
* Explicitly cast return type from mallocs - czmq is built with the C++ compiler
  on windows, so this is required.
* Add zfile.c and zsys.c to the czmq vcproj definition
* Add Ws2_32.lib and Iphlpapi.lib to the czmq_selftest.vcproj dependencies list;
  these are needed for socket-type operations.
Merge pull request #126 from vortechs2000/fix_windows

Fix windows builds
Replace TRUE/FALSE with true/false in zbeacon.c to fix *NIX builds

* Now that stdbool is setup properly, true/false are valid
* TRUE/FALSE definitions were removed by 5b341b4940
Fix Solaris builds - they need sys/sockio.h for SIOCGIFADDR defs
Add configurations to the solution file to build czmq DLLs
 * Adds two new configurations in the Solution: DebugDLL and ReleaseDLL
 * czmq_selftest does not build when the DLL config is selected because
   the *_test() functions aren't exported by the DLL, so the build would
   fail
Merge pull request #127 from vortechs2000/fix_unix

Fix *nix builds
Merge pull request #128 from vortechs2000/BuildsWindowsDLLs

Add configurations to the solution file to build czmq DLLs for Windows builds
mingw32 already defines mode_t in sys/types.h
Merge pull request #130 from pijyoi/master

mingw32 already defines mode_t in sys/types.h
Convert to MSVC 11
Silence warning
Fix all configurations in the MSVC project. czmq DLL config uses libzmq DLL config etc.