Initial v16 ODK Library

This commit has the initial ODK library.  Partners may use this code
to begin integrating the ODK library into their platform.  The
functionality is not complete, but this should help partners get an
early start playing with build files.

util/include/string_conversions.h

@@ -7,6 +7,7 @@
 
 #include <stddef.h>
 #include <stdint.h>
+
 #include <string>
 #include <vector>
 
@@ -35,6 +36,8 @@ CORE_UTIL_EXPORT std::string IntToString(int value);
 CORE_UTIL_EXPORT int64_t htonll64(int64_t x);
 CORE_UTIL_EXPORT inline int64_t ntohll64(int64_t x) { return htonll64(x); }
 CORE_UTIL_EXPORT std::string BytesToString(const uint8_t* bytes, unsigned size);
+// Encode unsigned integer into a big endian formatted string
+CORE_UTIL_EXPORT std::string EncodeUint32(unsigned int u);
 
 }  // namespace wvcdm