Updated version number.

Backported #441 to cpp-1.4.

Fixed a pointer operation problem at msgpack::zone::chunk_list::clear().
It was only happened on C++03.

Updated the version to 1.4.1.

Backported #436 to version 1.4.0.

Backported #435 to version 1.4.0.

Backported #426 to version 1.4.0.

Backported #423 to version 1.4.0.

Release version 1.4.0.

Fixed markdown layouts.

Fixed #399

If MSGPACK_DISABLE_LEGACY_CONVERT is defined, msgpack::object::convert(T*) is removed.
Added MSGPACK_DISABLE_LEGACY_CONVERT to build system and documents.

Please define MSGPACK_DISABLE_LEGACY_CONVERT and update your code as follows:
Replace
  int i;
  obj.convert(&i); // Removed pointer version
with
  int i;
  obj.convert(i);  // Reference version

Added MSGPACK_DISABLE_LEGACY_NIL to build system and documents.

Fixed existing code compile error problem.

Changed macro name from MSGPACK_USE_LEGACY_NIL to
MSGPACK_DISABLE_LEGACY_NIL. msgpack-c shouldn't make compile error on
existing codes by default without major version up.
So if you want to disable msgpack::type::nil, you need to define
MSGPACK_DISABLE_LEGACY_NIL macro.

Fixed -Wshadow warning.

Replaced nil with nil_t.

Added unpack, pack, object, and object_handle documentation.

Added nil typedef for existing codes.

Fixed an incompatible type warning

Fixed #395

Check whether MSGPACK_ENDIAN_LITTLE_BYTE is true, not defined.

msgpack/predef/other/endian.h always defines both
MSGPACK_ENDIAN_LITTLE_BYTE and MSGPACK_ENDIAN_BIG_BYTE, but they're
defined to a true or false value depending on whether the system is
little/big endian.

Fix this condition to check the truthiness rather than whether it is
defined, like the other locations this macro is checked.

Closes #403

Signed-off-by: James McCoy <jamessan@jamessan.com>

libmsgpack.[a|so] is the library file for C++.
libmsgpackc.[a|so] is the library file for C.
Since version 1.0.0, the C++ parts of msgpack-c is a header only
library. So libmsgpack.* shouldn't be generated.

On the autotools building environment, removed libmsgpack.*
generation. On the cmake building environment, replaced libmsgpack.*
with libmsgpackc.* and set so-version to 2.0.0.

Fixed #392

Fixed #396.

Avoided the warning when `char` does not have sign using template lazy instantiation.
Removed redundant `inline`.

Add CI testing of signed/unsigned char differences