Removed the unused serialization implementation of binary_blob_t.
Fixed whitespace around a pointer.  Sigh.
Added datum_serialize, etc, albeit just for datum_t.
Made the datum_serialize functions call datum_serialize versions of stl_types functions and such, for the most part.
Added serialize_universal for std::string.
Added comment.
Removed versioned serialization of wire_string_t.
Removed stupid comment written by yours truly.
Made datum_serialize of std::map be non-generic.
Removed datum_serialize for std::pair.

(It is just less code and verbiage this way.)
Removed a needless RSI... for now.
Moved datum serialization to rdb_protocol/serialize_datum.hpp.