Windows compatibility (#57)

* Add Python and Redis submodules, and remove old third-party modules

* Update VS projects (WARNING: references files that do not exist yet)

* Update code & add shims for APIs except AF_UNIX/{send,recv}msg()

* Minor style changes.

src/common/event_loop.h

@@ -2,7 +2,14 @@
 #define EVENT_LOOP_H
 
 #include <stdint.h>
+
+#ifdef _WIN32
+/* Quirks mean that Windows version needs to be included differently */
+#include <hiredis/hiredis.h>
+#include <ae.h>
+#else
 #include "ae/ae.h"
+#endif
 
 /* Unique timer ID that will be generated when the timer is added to the
  * event loop. Will not be reused later on in another call