Added MSVC++ support for unicorn

This lets you import the pre-built unicorn.dll files with Microsoft
Visual C++ projects.

There is support for static and dynamic linking of dlls. This has been
tested as working for both 32bit and 64bit versions.

The dynamic linking code should also work in Linux, though I have not
tested it.

include/unicorn/unicorn_dynload.h

@@ -0,0 +1,67 @@
+// 
+// Dynamic loader for unicorn shared library in windows and linux.
+// This was made for v0.9 of unicorn.
+// Newer versions of unicorn may require changes to these files.
+// 
+// Windows Notes:
+// If an absolute path to unicorn.dll is passed into uc_dyn_load() it will
+// still try to load the rest of the dependent dlls (ie libglib-2.0-0.dll etc)
+// from standard dll paths. This is usually the directory that the main
+// exe file, that loaded unicorn.dll, is in. This is standard behaviour for
+// Windows dll files, and not specific to unicorn dlls.
+// 
+// So putting all dlls in their own directory and then attempting to load
+// unicorn.dll from that directory via an absolute path will cause
+// uc_dyn_load() to fail.
+// 
+// The easiest way around this is to place all dlls in the same directory
+// as your main exe file. Other ways around this are using various flags
+// for LoadLibraryEx() or by calling SetDllDirectory().
+// 
+// LoadLibraryEx info:
+// https://msdn.microsoft.com/en-us/library/windows/desktop/ms684179(v=vs.85).aspx
+// SetDllDirectory() info:
+// https://msdn.microsoft.com/en-us/library/windows/desktop/ms686203(v=vs.85).aspx
+// 
+// Zak Escano  -  November 2015
+// 
+
+#ifndef _UNICORN_DYNLOAD_H_
+#define _UNICORN_DYNLOAD_H_
+
+// Undefine shared here so that functions aren't defined as: "__declspec(dllexport)"
+#ifdef UNICORN_SHARED
+#undef UNICORN_SHARED
+#endif
+#include "unicorn.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/*
+ Dynamically load shared library.
+ Check the notes at the top for info regarding dll file locations in windows.
+ 
+ @path: path to shared library file. (NULL to use default path)
+ @flags: system specific flags for loading shared library file. (0 for default)
+
+ @return true on success, false if failed.
+*/
+bool uc_dyn_load(const char* path, int flags);
+
+/*
+ Free resources when done using shared library.
+
+ @return true on success, false if failed.
+*/
+bool uc_dyn_free(void);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _UNICORN_DYNLOAD_H_
+